What Is a Stablecoin? A Plain-English Guide
A stablecoin is a digital dollar that never crashes. It is always worth exactly $1.00 — and it can earn 3–13% interest per year. Here is everything you need to know in plain English, no crypto experience required.
The simple definition
A stablecoin is a type of digital currency that is pegged to a stable asset — almost always the US dollar. One USDC (USD Coin) is always worth exactly $1.00. One USDT (Tether) is always worth exactly $1.00. The price does not go up or down.
This is what makes stablecoins fundamentally different from Bitcoin or Ethereum. Bitcoin might be worth $60,000 today and $30,000 next month. A stablecoin is designed to be boring — it just holds its value, like a dollar in your pocket, but on the internet.
The interesting part is that stablecoins can earn interest. Because they live on a blockchain, they can be lent to borrowers around the world who pay for access to dollar liquidity. That interest — typically 3–13% per year — flows back to you.
Stablecoins vs. other assets
Here is how USDC compares to the assets most people already use:
| Asset | Stable? | Earns yield? | Crypto? | Notes |
|---|---|---|---|---|
| US Dollar (cash) | Yes | 0% | No | Loses value to inflation |
| Bank savings account | Yes | 0.5–4.5% | No | FDIC insured up to $250k |
| USDC (stablecoin) | Yes | 3–13% APY | Yes | Not FDIC insured |
| Bitcoin | No | 0% (typically) | Yes | High price volatility |
| Ethereum | No | 3–5% (staking) | Yes | High price volatility |
How stablecoin interest actually works
You do not need to understand blockchain to earn stablecoin interest. Here is the four-step version:
You buy USDC on a platform like Coinbase or Revolut. Your dollars are converted 1:1 into USDC. One USDC always equals one US dollar.
The platform lends your USDC to borrowers — institutions, traders, or DeFi protocols — who need dollar liquidity and pay interest for it.
The interest paid by borrowers is passed back to you as yield, typically 3–13% APY depending on the platform and market conditions.
Most platforms let you withdraw your USDC back to dollars at any time with no lock-up. One USDC is still worth exactly $1.00.
Why does USDC pay more than my bank?
Your bank pays 0.01–0.5% because it can. It has millions of customers with nowhere else to go, and it keeps the spread between what it earns on your deposits and what it pays you.
Stablecoin platforms operate in a global market for dollar liquidity. Borrowers in emerging markets, crypto traders, and DeFi protocols all compete to borrow USDC, and they pay market rates — typically 5–15% — for access to it. Platforms pass a large share of that yield back to depositors to attract capital.
The higher yield reflects higher risk. You are not FDIC insured. If the platform fails, you could lose your funds. This is why choosing regulated, audited platforms matters — and why StablePerks only lists platforms with verifiable track records.
Unlike a bank account, stablecoin deposits are not protected by the FDIC. The main risks are platform failure and, in rare cases, a stablecoin losing its peg. Manage risk by using only regulated platforms, diversifying across two or three providers, and never depositing more than you can afford to lose.
The four main stablecoins
| Stablecoin | Issuer | Market Cap | Audit | Best For |
|---|---|---|---|---|
| USDC | Circle | $44B+ | Monthly (Deloitte) | US, EU, regulated markets |
| USDT | Tether | $140B+ | Quarterly | Emerging markets, trading |
| DAI | MakerDAO (decentralised) | $5B+ | On-chain (transparent) | DeFi users |
| PYUSD | PayPal | $1B+ | Monthly | PayPal users, US |
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See all perks →Frequently asked questions
What is a stablecoin?
A stablecoin is a type of cryptocurrency designed to maintain a stable value, usually pegged 1:1 to the US dollar. Unlike Bitcoin or Ethereum, stablecoins do not fluctuate wildly in price. One USDC is always worth $1.00. They combine the stability of traditional money with the programmability and global reach of blockchain technology.
Is a stablecoin the same as Bitcoin?
No. Bitcoin is a speculative asset whose price can rise or fall by 50% or more in a single year. A stablecoin like USDC is designed to always be worth exactly $1.00. You use stablecoins to hold value and earn yield, not to speculate on price movements.
How do stablecoins earn interest?
Stablecoins earn interest because platforms lend them to borrowers (businesses, traders, DeFi protocols) who pay interest for access to dollar liquidity. That interest is passed back to depositors as yield. Rates of 3-13% APY are common because dollar liquidity is scarce in crypto markets and borrowers pay a premium for it.
Are stablecoins safe?
Regulated stablecoins like USDC (issued by Circle) are considered low-risk relative to other crypto assets. Circle holds 100% of USDC reserves in cash and short-term US Treasuries, audited monthly by Deloitte. However, stablecoins are not FDIC insured. Platform risk (the risk that a platform holding your stablecoins fails) is the primary risk to manage by using only regulated, well-capitalised platforms.
What is the difference between USDC and USDT?
USDC (USD Coin) is issued by Circle and is considered the most transparent and regulated stablecoin. Its reserves are audited monthly by Deloitte. USDT (Tether) is the largest stablecoin by market cap and is widely used in emerging markets. Both are pegged to $1.00, but USDC is generally preferred in regulated markets like the US and EU due to its audit transparency.