Here’s my monthly roundup of the best interest rates on cash as of May 2021, roughly sorted from shortest to longest maturities. Included are some lesser-known opportunities to improve your yield while keeping your principal FDIC-insured or equivalent. Check out my Ultimate Rate-Chaser Calculator to see how much extra interest you’d earn by moving money between accounts. Rates listed are available to everyone nationwide. Rates checked as of 5/9/2021.

Fintech accounts
Available only to individual investors, fintech accounts oftentimes pay higher-than-market rates in order to achieve high short-term growth (often using venture capital). I define “fintech” as a software layer on top of a different bank’s FDIC insurance. These do NOT require a certain number debit card purchases per month. Although I do use some of these after doing my own due diligence, read about the Beam app for potential pitfalls and best practices.

• 3% APY on up to $100,000. The top rate is 3% APY for April through June 2021, and they have not indicated any upcoming rate drop. HM Bradley requires a recurring direct deposit every month and a savings rate of at least 20%. See my HM Bradley review.
• 3% APY on 10% of direct deposits + 1% APY on $25,000. One Finance lets you earn 3% APY on “auto-save” deposits (up to 10% of your direct deposit, up to $1,000 per month). Separately, they also pay 1% APY on up to another $25,000 with direct deposit. New customer $50 bonus via referral. See my One Finance review.
• 3% APY on up to $15,000. Porte requires a one-time direct deposit of $1,000+ to open a savings account. New customer $50 bonus via referral. See my Porte review.
• 2.15% APY on up to $5k/$30k. Limited-time offer of free membership to their higher balance tier for 6 months with direct deposit. See my OnJuno review.

High-yield savings accounts
While the huge megabanks pay essentially no interest, it’s easy to open a new “piggy-back” savings account and simply move some funds over from your existing checking account. The interest rates on savings accounts can drop at any time, so I list the top rates as well as competitive rates from banks with a history of competitive rates. Some banks will bait you with a temporary top rate and then lower the rates in the hopes that you are too lazy to leave.

• T-Mobile Money is still at 1.00% APY with no minimum balance requirements. The main focus is on the 4% APY on your first $3,000 of balances as a qualifying T-mobile customer plus other hoops, but the lesser-known perk is the 1% APY for everyone. Thanks to the readers who helped me understand this. There are several other established high-yield savings accounts at closer to 0.50% APY.

Short-term guaranteed rates (1 year and under)
A common question is what to do with a big pile of cash that you’re waiting to deploy shortly (just sold your house, just sold your business, legal settlement, inheritance). My usual advice is to keep things simple and take your time. If not a savings account, then put it in a flexible short-term CD under the FDIC limits until you have a plan.

• No Penalty CDs offer a fixed interest rate that can never go down, but you can still take out your money (once) without any fees if you want to use it elsewhere. Marcus has a 7-month No Penalty CD at 0.45% APY with a $500 minimum deposit. AARP members can get an 8-month CD at 0.55% APY. Ally Bank has a 11-month No Penalty CD at 0.50% APY for all balance tiers. CIT Bank has a 11-month No Penalty CD at 0.30% APY with a $1,000 minimum deposit. You may wish to open multiple CDs in smaller increments for more flexibility.
• Lafayette Federal Credit Union has a 12-month CD at 0.80% APY ($500 min). Early withdrawal penalty is 6 months of interest. Anyone can join this credit union via partner organization ($10 one-time fee).

Money market mutual funds + Ultra-short bond ETFs
Many brokerage firms that pay out very little interest on their default cash sweep funds (and keep the difference for themselves). Unfortunately, money market fund rates are very low across the board right now. Ultra-short bond funds are another possible alternative, but they are NOT FDIC-insured and may experience short-term losses in extreme cases. These numbers are just for reference, not a recommendation.

• The default sweep option is the Vanguard Federal Money Market Fund which has an SEC yield of 0.01%. Vanguard Cash Reserves Federal Money Market Fund (formerly Prime Money Market) currently pays 0.01% SEC yield.
• Vanguard Ultra-Short-Term Bond Fund currently pays 0.37% SEC yield ($3,000 min) and 0.47% SEC Yield ($50,000 min). The average duration is ~1 year, so your principal may vary a little bit.
• The PIMCO Enhanced Short Maturity Active Bond ETF (MINT) has a 0.29% SEC yield and the iShares Short Maturity Bond ETF (NEAR) has a 0.41% SEC yield while holding a portfolio of investment-grade bonds with an average duration of ~6 months.

Treasury Bills and Ultra-short Treasury ETFs
Another option is to buy individual Treasury bills which come in a variety of maturities from 4-weeks to 52-weeks. You can also invest in ETFs that hold a rotating basket of short-term Treasury Bills for you, while charging a small management fee for doing so. T-bill interest is exempt from state and local income taxes. Right now, this section isn’t very interesting as T-Bills are yielding close to zero!

• You can build your own T-Bill ladder at TreasuryDirect.gov or via a brokerage account with a bond desk like Vanguard and Fidelity. Here are the current Treasury Bill rates. As of 5/7/2021, a new 4-week T-Bill had the equivalent of 0.01% annualized interest and a 52-week T-Bill had the equivalent of 0.05% annualized interest.
• The Goldman Sachs Access Treasury 0-1 Year ETF (GBIL) has a -0.01% SEC yield and the SPDR Bloomberg Barclays 1-3 Month T-Bill ETF (BIL) has a -0.12% (!) SEC yield. GBIL appears to have a slightly longer average maturity than BIL.

US Savings Bonds
Series I Savings Bonds offer rates that are linked to inflation and backed by the US government. You must hold them for at least a year. If you redeem them within 5 years there is a penalty of the last 3 months of interest. The annual purchase limit is $10,000 per Social Security Number, available online at TreasuryDirect.gov. You can also buy an additional $5,000 in paper I bonds using your tax refund with IRS Form 8888.

• “I Bonds” bought between May 2021 and October 2021 will earn a 3.51% rate for the first six months. The rate of the subsequent 6-month period will be based on inflation again. More info here.
• In mid-October 2021, the CPI will be announced and you will have a short period where you will have a very close estimate of the rate for the next 12 months. I will have another post up at that time.
• See below about EE Bonds as a potential long-term bond alternative.

Prepaid Cards with Attached Savings Accounts
A small subset of prepaid debit cards have an “attached” FDIC-insured savings account with exceptionally high interest rates. The negatives are that balances are severely capped, and there are many fees that you must be careful to avoid (lest they eat up your interest). There is a long list of previous offers that have already disappeared with little notice. I don’t personally recommend nor use any of these anymore, as I feel the work required and risk of messing up exceeds any small potential benefit.

• Mango Money pays 6% APY on up to $2,500, if you manage to jump through several hoops. Requirements include $1,500+ in “signature” purchases and a minimum balance of $25.00 at the end of the month.

Rewards checking accounts
These unique checking accounts pay above-average interest rates, but with unique risks. You have to jump through certain hoops which usually involve 10+ debit card purchases each cycle, a certain number of ACH/direct deposits, and/or a certain number of logins per month. If you make a mistake (or they judge that you did) you risk earning zero interest for that month. Some folks don’t mind the extra work and attention required, while others would rather not bother. Rates can also drop suddenly, leaving a “bait-and-switch” feeling.

• The Bank of Denver pays 2.00% APY on up to $25,000 if you make 12 debit card purchases of $5+ each, receive only online statements, and make at least 1 ACH credit or debit transaction per statement cycle. The rate recently dropped. If you meet those qualifications, you can also link a Kasasa savings account that pays 1.00% APY on up to $50k. Thanks to reader Bill for the updated info.
• Devon Bank has a Kasasa Checking paying 2.50% APY on up to $10,000, plus a Kasasa savings account paying 2.50% APY on up to $10,000 (and 0.85% APY on up to $50,000). You’ll need at least 12 debit transactions of $3+ and other requirements every month. The rate recently dropped.
• Presidential Bank pays 2.25% APY on balances up to $25,000, if you maintain a $500+ direct deposit and at least 7 electronic withdrawals per month (ATM, POS, ACH and Billpay counts).
• Evansville Teachers Federal Credit Union pays 3.30% APY on up to $20,000. You’ll need at least 15 debit transactions and other requirements every month.
• Lake Michigan Credit Union pays 3.00% APY on up to $15,000. You’ll need at least 10 debit transactions and other requirements every month.
• Find a locally-restricted rewards checking account at DepositAccounts.

Certificates of deposit (greater than 1 year)
CDs offer higher rates, but come with an early withdrawal penalty. By finding a bank CD with a reasonable early withdrawal penalty, you can enjoy higher rates but maintain access in a true emergency. Alternatively, consider building a CD ladder of different maturity lengths (ex. 1/2/3/4/5-years) such that you have access to part of the ladder each year, but your blended interest rate is higher than a savings account. When one CD matures, use that money to buy another 5-year CD to keep the ladder going. Some CDs also offer “add-ons” where you can deposit more funds if rates drop.

• NASA Federal Credit Union has a special 49-month Share Certificate at 1.40% APY ($10,000 min). Early withdrawal penalty is 1 year of interest. Anyone can join this credit union by joining the National Space Society (free). Note that NASA FCU may perform a hard credit check as part of new member application.
• Lafayette Federal Credit Union has a 5-year CD at 1.26% APY ($500 min). Early withdrawal penalty is 6 months of interest. Anyone can join this credit union via partner organization ($10 one-time fee).
• You can buy certificates of deposit via the bond desks of Vanguard and Fidelity. You may need an account to see the rates. These “brokered CDs” offer FDIC insurance and easy laddering, but they don’t come with predictable early withdrawal penalties. Right now, I see a 5-year CD at 1.00% APY vs. 0.77% for a 5-year Treasury. Be wary of higher rates from callable CDs listed by Fidelity.

Longer-term Instruments
I’d use these with caution due to increased interest rate risk, but I still track them to see the rest of the current yield curve.

• Willing to lock up your money for 10 years? You can buy long-term certificates of deposit via the bond desks of Vanguard and Fidelity. These “brokered CDs” offer FDIC insurance, but they don’t come with predictable early withdrawal penalties. You might find something that pays more than your other brokerage cash and Treasury options. Right now, I see a 10-year CD at 1.80% APY vs. 1.60% for a 10-year Treasury. Watch out for higher rates from callable CDs from Fidelity.
• How about two decades? Series EE Savings Bonds are not indexed to inflation, but they have a unique guarantee that the value will double in value in 20 years, which equals a guaranteed return of 3.5% a year. However, if you don’t hold for that long, you’ll be stuck with the normal rate which is quite low (currently 0.10%). I view this as a huge early withdrawal penalty. But if holding for 20 years isn’t an issue, it can also serve as a hedge against prolonged deflation during that time. Purchase limit is $10,000 each calendar year for each Social Security Number. As of 5/7/2021, the 20-year Treasury Bond rate was 2.17%.

All rates were checked as of 5/9/2021.

Here’s my monthly roundup of the best interest rates on cash as of April 2021, roughly sorted from shortest to longest maturities. There are many lesser-known opportunities to improve your yield while keeping your principal “safe” (FDIC-insured or equivalent). Check out my Ultimate Rate-Chaser Calculator to see how much extra interest you’d earn by moving money between accounts. Rates listed are available to everyone nationwide. Rates checked as of 4/5/2021.

Fintech accounts
Available only to individual investors, fintech accounts oftentimes pay higher-than-market rates in order to achieve high short-term growth (often using venture capital). I define “fintech” as a software layer on top of a different bank’s FDIC insurance. Although I do use some of these after doing my own due diligence, read about the Beam app for potential pitfalls and best practices.

• 3% APY on up to $100,000. The top rate is 3% APY for April through June 2021, and they have not indicated any upcoming rate drop. HM Bradley requires a recurring direct deposit every month and a savings rate of at least 20%. See my HM Bradley review.
• 3% APY on 10% of direct deposits + 1% APY on $5,000. One Finance lets you earn 3% APY on “auto-save” deposits (up to 10% of your direct deposit, up to $1,000 per month). Separately, they also pay 1% APY on up to another $25,000 with direct deposit. New $50 bonus via referral. See my One Finance review.
• 3% APY on up to $15,000. Porte requires a one-time direct deposit of $1,000+ to open a savings account. $50 bonus via referral. See my Porte review.
• 2.15% APY on up to $5k/$30k. Limited-time offer of free membership to their higher balance tier for 6 months with direct deposit. See my OnJuno review.

High-yield savings accounts
While the huge megabanks pay essentially no interest, it’s easy to open a new “piggy-back” savings account and simply move some funds over from your existing checking account. The interest rates on savings accounts can drop at any time, so I list the top rates as well as competitive rates from banks with a history of competitive rates. Some banks will bait you with a temporary top rate and then lower the rates in the hopes that you are too lazy to leave.

• 1.25% APY on up to $250k. ZYNLO is a division of PeoplesBank with its own FDIC certificate. It also offers 100% roundup matching on debit card purchases if you maintain a $3,000 balance. See my ZYNLO review.
• T-Mobile Money is still at 1.00% APY with no minimum balance requirements. The main focus is on the 4% APY on your first $3,000 of balances as a qualifying T-mobile customer plus other hoops, but the lesser-known perk is the 1% APY for everyone. Thanks to the readers who helped me understand this. There are several other established high-yield savings accounts at closer to 0.50% APY.

Short-term guaranteed rates (1 year and under)
A common question is what to do with a big pile of cash that you’re waiting to deploy shortly (just sold your house, just sold your business, legal settlement, inheritance). My usual advice is to keep things simple and take your time. If not a savings account, then put it in a flexible short-term CD under the FDIC limits until you have a plan.

• No Penalty CDs offer a fixed interest rate that can never go down, but you can still take out your money (once) without any fees if you want to use it elsewhere. Marcus has a 7-month No Penalty CD at 0.45% APY with a $500 minimum deposit. AARP members can get an 8-month CD at 0.55% APY. Ally Bank has a 11-month No Penalty CD at 0.50% APY for all balance tiers. CIT Bank has a 11-month No Penalty CD at 0.30% APY with a $1,000 minimum deposit. You may wish to open multiple CDs in smaller increments for more flexibility.
• Lafayette Federal Credit Union has a 12-month CD at 0.80% APY ($500 min). Early withdrawal penalty is 6 months of interest. Anyone can join this credit union via partner organization ($10 one-time fee).

Money market mutual funds + Ultra-short bond ETFs
Normally, I would say to watch out for brokerage firms that pay out very little interest on their default cash sweep funds (and keep the difference for themselves). However, money market fund rates are very low across the board right now. Ultra-short bond funds are another possible alternative, but they are NOT FDIC-insured and may experience short-term losses in extreme cases. I personally don’t think the risk is worth the tiny yield at this time.

• The default sweep option is the Vanguard Federal Money Market Fund which has an SEC yield of 0.01%. Vanguard Cash Reserves Federal Money Market Fund (formerly Prime Money Market) currently pays 0.01% SEC yield.
• Vanguard Ultra-Short-Term Bond Fund currently pays 0.42% SEC yield ($3,000 min) and 0.52% SEC Yield ($50,000 min). The average duration is ~1 year, so your principal may vary a little bit.
• The PIMCO Enhanced Short Maturity Active Bond ETF (MINT) has a 0.31% SEC yield and the iShares Short Maturity Bond ETF (NEAR) has a 0.45% SEC yield while holding a portfolio of investment-grade bonds with an average duration of ~6 months.

Treasury Bills and Ultra-short Treasury ETFs
Another option is to buy individual Treasury bills which come in a variety of maturities from 4-weeks to 52-weeks. You can also invest in ETFs that hold a rotating basket of short-term Treasury Bills for you, while charging a small management fee for doing so. T-bill interest is exempt from state and local income taxes. Right now, this section isn’t very interesting as T-Bills are yielding close to zero!

• You can build your own T-Bill ladder at TreasuryDirect.gov or via a brokerage account with a bond desk like Vanguard and Fidelity. Here are the current Treasury Bill rates. As of 4/5/2021, a new 4-week T-Bill had the equivalent of 0.03% annualized interest and a 52-week T-Bill had the equivalent of 0.06% annualized interest.
• The Goldman Sachs Access Treasury 0-1 Year ETF (GBIL) has a -0.01% SEC yield and the SPDR Bloomberg Barclays 1-3 Month T-Bill ETF (BIL) has a -0.10% (!) SEC yield. GBIL appears to have a slightly longer average maturity than BIL.

US Savings Bonds
Series I Savings Bonds offer rates that are linked to inflation and backed by the US government. You must hold them for at least a year. If you redeem them within 5 years there is a penalty of the last 3 months of interest. The annual purchase limit is $10,000 per Social Security Number, available online at TreasuryDirect.gov. You can also buy an additional $5,000 in paper I bonds using your tax refund with IRS Form 8888.

• “I Bonds” bought between November 2020 and April 2021 will earn a 1.68% rate for the first six months. The rate of the subsequent 6-month period will be based on inflation again. More info here.
• In mid-April 2021, the CPI will be announced and you will have a short period where you will have a very close estimate of the rate for the next 12 months. I will have another post up at that time.
• See below about EE Bonds as a potential long-term bond alternative.

Prepaid Cards with Attached Savings Accounts
A small subset of prepaid debit cards have an “attached” FDIC-insured savings account with exceptionally high interest rates. The negatives are that balances are severely capped, and there are many fees that you must be careful to avoid (lest they eat up your interest). There is a long list of previous offers that have already disappeared with little notice. I don’t personally recommend nor use any of these anymore, as I feel the work required and risk of messing up exceeds any small potential benefit.

• Mango Money pays 6% APY on up to $2,500, if you manage to jump through several hoops. Requirements include $1,500+ in “signature” purchases and a minimum balance of $25.00 at the end of the month.

Rewards checking accounts
These unique checking accounts pay above-average interest rates, but with unique risks. You have to jump through certain hoops which usually involve 10+ debit card purchases each cycle, a certain number of ACH/direct deposits, and a certain number of logins per month. If you make a mistake (or they judge that you did) you risk earning zero interest for that month. Some folks don’t mind the extra work and attention required, while others would rather not bother. Rates can also drop suddenly, leaving a “bait-and-switch” feeling.

• The Bank of Denver pays 2.00% APY on up to $25,000 if you make 12 debit card purchases of $5+ each, receive only online statements, and make at least 1 ACH credit or debit transaction per statement cycle. The rate recently dropped. If you meet those qualifications, you can also link a Kasasa savings account that pays 1.00% APY on up to $50k. Thanks to reader Bill for the updated info.
• Devon Bank has a Kasasa Checking paying 2.50% APY on up to $10,000, plus a Kasasa savings account paying 2.50% APY on up to $10,000 (and 0.85% APY on up to $50,000). You’ll need at least 12 debit transactions of $3+ and other requirements every month. The rate recently dropped.
• Presidential Bank pays 2.25% APY on balances up to $25,000, if you maintain a $500+ direct deposit and at least 7 electronic withdrawals per month (ATM, POS, ACH and Billpay counts).
• Evansville Teachers Federal Credit Union pays 3.30% APY on up to $20,000. You’ll need at least 15 debit transactions and other requirements every month.
• Lake Michigan Credit Union pays 3.00% APY on up to $15,000. You’ll need at least 10 debit transactions and other requirements every month.
• Find a locally-restricted rewards checking account at DepositAccounts.

Certificates of deposit (greater than 1 year)
CDs offer higher rates, but come with an early withdrawal penalty. By finding a bank CD with a reasonable early withdrawal penalty, you can enjoy higher rates but maintain access in a true emergency. Alternatively, consider building a CD ladder of different maturity lengths (ex. 1/2/3/4/5-years) such that you have access to part of the ladder each year, but your blended interest rate is higher than a savings account. When one CD matures, use that money to buy another 5-year CD to keep the ladder going. Some CDs also offer “add-ons” where you can deposit more funds if rates drop.

• NASA Federal Credit Union has a special 49-month Share Certificate at 1.50% APY ($10,000 min). Early withdrawal penalty is 1 year of interest. Anyone can join this credit union by joining the National Space Society (free). Note that NASA FCU may perform a hard credit check as part of new member application.
• Lafayette Federal Credit Union has a 5-year CD at 1.25% APY ($500 min). Early withdrawal penalty is 6 months of interest. Anyone can join this credit union via partner organization ($10 one-time fee).
• You can buy certificates of deposit via the bond desks of Vanguard and Fidelity. You may need an account to see the rates. These “brokered CDs” offer FDIC insurance and easy laddering, but they don’t come with predictable early withdrawal penalties. Right now, I see a 5-year CD at 0.90% APY vs. 0.98% APY for a 5-year Treasury. Be wary of higher rates from callable CDs listed by Fidelity.

Longer-term Instruments
I’d use these with caution due to increased interest rate risk, but I still track them to see the rest of the current yield curve.

• Willing to lock up your money for 10 years? You can buy long-term certificates of deposit via the bond desks of Vanguard and Fidelity. These “brokered CDs” offer FDIC insurance, but they don’t come with predictable early withdrawal penalties. You might find something that pays more than your other brokerage cash and Treasury options. Right now, I see a 10-year CD at 1.80% APY vs. 1.70% APY for a 10-year Treasury. Watch out for higher rates from callable CDs from Fidelity.
• How about two decades? Series EE Savings Bonds are not indexed to inflation, but they have a unique guarantee that the value will double in value in 20 years, which equals a guaranteed return of 3.5% a year. However, if you don’t hold for that long, you’ll be stuck with the normal rate which is quite low (currently 0.10%). I view this as a huge early withdrawal penalty. But if holding for 20 years isn’t an issue, it can also serve as a hedge against prolonged deflation during that time. Purchase limit is $10,000 each calendar year for each Social Security Number. As of 4/5/2021, the 20-year Treasury Bond rate was 2.28%.

All rates were checked as of 4/5/2021.

This WSJ article is the first mainstream financial article that I’ve seen discuss the high interest rates paid on Bitcoin and stablecoin (cryptocurrency backed by a “stable” asset like the US dollar). I am (again) not a cryptocurrency expert, but it does seem appropriate to educate and warn other curious investors about the risks. Here’s my take:

• The price of Bitcoin can vary a lot. It probably went up or down by a hundred dollars in the time you took to read this sentence.
• Stablecoin prices tend to vary less because they promise to be backed by a stable asset. USDT (Tether) and USDC (USD Coin) are both currently trading exactly at US$1.00, so it appears that the market believes this claim. However, US dollar stablecoins are not affiliated with the US government or any central bank.
• Brokers/exchanges where you can buy and sell these cryptocurrencies are not backed by government insurance. They are businesses – some will end up worth billions, some will get bought by a bigger competitor, and some will probably fail (likely because they were hacked). Even though they might be called “savings” or “interest” accounts, no cryptocurrency is held in an FDIC-insured bank, or even an SIPC-insured brokerage account. They will promise to keep your crypto safe and pay interest, but it is possible they may not live up to their end of the deal, AKA “counterparty risk”. Not every exchange is equal.
• This potential risk is a big reason that they have to pay you 6% annual interest in your Bitcoin and/or 9% annual interest in your USDC stablecoin. They are lending out your assets and earning even more interest, because traditional banks won’t do so.
• The result is two separate risks – the risk of the price of crypto itself, and counterparty risk of the place holding your crypto.

In the end, I agree with this part of the article (even with the mocking tone):

If you’re a risk-taker who relishes the ride when an asset soars and can laugh off the losses when it crashes, then maybe you should consider letting a broker borrow your cryptocurrency at a generous rate.

After all, if you aren’t troubled by the extraordinary volatility of virtual money, you might as well earn some interest on it.

I did buy some crypto a few years ago as a purely speculative investment and to promote my own learning. We are talking less than 1% of net worth, but it has become a 5-figure amount. I was very skeptical at first, but now I am partial to the theory that either BTC is worth zero, or it will eventually be worth at least on par with the market cap of gold (roughly $200,000). I accept that both scenarios are possible.

I bought Bitcoin using the Voyager app ($25 bonus, publicly-traded with $3 Billion market cap) and also opened an account with BlockFi ($250 bonus, just completed $350m Series D at $3B valuation). Both of these companies are worth well over a billion dollars and gone though various rounds of funding, which isn’t bulletproof but it means that smarter people than me have vetted their security protocols and business practices.

BlockFi pays me 6% interest on up to 2 BTC (8.6% on USDC) and Voyager pays 6.25% interest on BTC (9% on USDC). I reinvest the interest so that I own a little bit more BTC each month. However, I fully accept that I am getting paid this interest and getting the convenience of buying BTC with a few taps in exchange for the potential risk that they will go bust while losing all my BTC. There are other options like hardware wallets, but I am don’t want the inconvenience or to worry about forgetting my bitcoin passwords for my relatively small investment.

Bottom line. Sorry, you can’t earn a 9% “safe” interest rate on your cryptocurrency, even if it is a US-dollar backed stablecoin. At a minimum, you still have counterparty risk. This is a business lending out your assets, charging interest, and giving you a cut. They can go bust, and not all exchanges are the same. Perform your own due diligence when picking a broker/exchange to buy from. I picked what I think are among the safest, but it’s still risky.

Even though the interest rates are quite low, I keep my “safe” cash in FDIC-insured bank accounts and similar.