Why Use DeFi When I-Bonds Yield More Risk-Free?

I Bonds Vs. Crypto Yields At A Glance

Source: TreasuryDirect, Cult of Money yield tracker data.

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Why I Bonds Pay So Much Right Now

An I bond's rate has two parts: a fixed rate set when you buy, and an inflation rate that resets every six months based on the Consumer Price Index. For bonds issued from Nov. 1, 2026 to April 30, 2027, TreasuryDirect set the fixed rate at 1.40% and the semiannual inflation rate at 2.04%, for a composite of 5.51%.

The 1.40% fixed rate is the part to notice. It stays with the bond for up to 30 years, so even if inflation drops to zero, the bond still earns 1.40% a year above inflation. Bonds bought from May through October 2026 locked in only a 0.90% fixed rate.

What To Know Before Buying I Bonds

• Purchase limit: $10,000 per person per calendar year in electronic bonds through TreasuryDirect. Paper bonds bought with a federal tax refund ended on Jan. 1, 2025.
• Lockup: you can't cash out for 12 months. If you cash out before five years, you give up the last three months of interest.
• Taxes: interest is subject to federal income tax but not state or local tax, and you can defer federal tax until you cash out.
• Rates change: the inflation part resets every six months, so 5.51% isn't guaranteed past the first six months.
• US only: you need a Social Security number and a US address. Readers elsewhere can look at their own government's inflation-linked bonds, such as UK index-linked gilts or Australian Treasury Indexed Bonds, usually bought through a broker.

What DeFi And Crypto Yields Pay Now

Crypto yields fall into two groups that carry very different risks.

Centralized Platforms (CeFi)

Exchanges and lenders pay rewards on balances you hold with them. On Nov. 1, 2026, Coinbase paid 3.75% on USDC to Coinbase One members, Kraken paid up to 2% on USDC, or up to 4% with its paid Kraken+ plan, and PayPal paid up to 4% on PayPal USD. Nexo advertised up to 10.5% on USDC, with the top rate requiring a fixed term and a higher loyalty tier. See current rates in our crypto savings accounts tracker.

These aren't DeFi. You hand your coins to a company, and if it fails, you can lose them. Celsius and Voyager, which collapsed in 2022, were centralized lenders, not DeFi protocols.

Decentralized Finance (DeFi)

DeFi lending markets such as Aave let you lend stablecoins directly through smart contracts and earn interest from borrowers who post crypto as collateral. Your coins stay in a contract you can withdraw from, not with a company. Rates move with demand: as more of a pool is borrowed, the rate rises, so it can change many times a day.

The risks are different, not smaller. A bug or exploit can drain a protocol, as happened when Drift Protocol lost about $295 million in April 2026, according to our crypto hacks tracker.

So Why Would Anyone Choose DeFi?

With I bonds paying more, the reasons to use crypto yields come down to what I bonds can't do:

• No cap: the $10,000 limit stops many savers from putting more than a small share of their cash in I bonds.
• No lockup: most stablecoin rewards and DeFi lending let you withdraw any day.
• Global access: anyone with an internet connection and a wallet can use DeFi, while I bonds are limited to US persons.
• Already in crypto: if you hold stablecoins between trades, earning 4% beats earning nothing.
• Higher yield for higher risk: some lenders and DeFi strategies pay well above 5.51%, with matching risk.

If you don't already hold crypto and you want a safe place for cash you won't need for a year, I bonds pay more with no default risk. Crypto yields make more sense for money that needs to stay liquid, sums above the I bond limit, or readers outside the US.

Risks Of Earning Yield In Crypto

• Platform failure: centralized lenders can freeze withdrawals and go bankrupt, as Celsius, Voyager and BlockFi did in 2022.
• Smart contract risk: DeFi protocols can be hacked or drained through bugs.
• Stablecoin risk: a stablecoin can lose its dollar peg, as TerraUSD did in May 2022.
• No insurance: crypto isn't covered by FDIC deposit insurance or SIPC protection.
• Rate changes: advertised rates can drop with little notice.
• Too-good-to-be-true yields: read how high APY crypto deals really work before chasing them.

The Bottom Line

For US savers with cash they won't touch for a year, I bonds now pay more than most crypto yields with none of the platform, hack or peg risk. Crypto yields still have a role for money that has to stay liquid, amounts above the $10,000 limit, people outside the US, and crypto holders who'd otherwise earn nothing on idle stablecoins. Whichever you choose, know exactly where the yield comes from.

FAQ

What Is The Current I Bond Rate?

I bonds issued from Nov. 1, 2026 through April 30, 2027 pay a 5.51% composite rate. That includes a 1.40% fixed rate for the life of the bond and an inflation rate that resets every six months.

Are I Bonds Better Than Stablecoin Yields?

For US savers, I bonds currently pay more, about 5.51% versus about 4%, and are backed by the US government. Stablecoin rewards win on flexibility, with no purchase cap and usually no lockup.

Can I Buy I Bonds From Outside The US?

Generally no. You need a Social Security number, a US address and a US bank account. Many other governments sell their own inflation-linked bonds through brokers.

Is DeFi Lending Safer Than A Crypto Exchange?

It's a different risk. DeFi removes the company that can freeze or lose your funds, but adds smart contract and hack risk. Neither is insured.

How Much Can I Put In I Bonds Each Year?

You can buy up to $10,000 in electronic I bonds per person per calendar year through TreasuryDirect. Married couples can each buy $10,000, and some people buy more in a trust or business name.