Stablecoin
In simple terms
A stablecoin is a digital currency designed to always be worth the same amount as real money, like a dollar. Think of it like a gift card that's always worth exactly $1—it doesn't go up or down in value like Bitcoin does.
Definition
A cryptocurrency pegged to a stable asset like USD.
In depth
A stablecoin is a cryptocurrency maintained at a stable value through collateralization, algorithmic mechanisms, or direct asset backing. Most stablecoins achieve this peg by holding reserves of fiat currency (like USD) or other assets in custodial accounts, with the supply adjustable through smart contracts to maintain price equilibrium. Some use over-collateralization with crypto assets and seigniorage mechanisms, relying on arbitrage incentives and oracles to defend their peg. This stability makes stablecoins useful as a medium of exchange and unit of account within blockchain ecosystems.
How does Stablecoin work?
Most stablecoins hold their value near a reference currency through backing and redemption. A fiat-backed issuer takes in dollars, holds reserves such as bank deposits and short-term Treasury bills, and mints one token for each dollar received. Authorized parties can redeem tokens back for dollars, so when the token trades below a dollar, buying it cheaply and redeeming at par pulls the price back up. Crypto-backed designs work differently: users lock surplus collateral in a smart contract that liquidates positions automatically if the collateral falls too far. Reserve quality, redemption access, and attestation frequency determine how reliably a peg holds.
An example
Someone converts $500 into a dollar-pegged stablecoin to hold value between trades. Using illustrative figures, the token trades at $0.999, so $500 buys about 500.5 tokens. A week later they convert back at $1.001 and receive roughly $501. Small deviations from a dollar are normal. If the issuer's reserves were impaired or redemptions were paused, the token could trade well below a dollar, and the holder would not be made whole.
Figures are illustrative only.
What beginners get wrong
- Assuming a peg is guaranteed; stablecoins have broken from a dollar before, and holders were left with losses when the issuer could not redeem.
- Treating every stablecoin as identical, when reserve composition, auditing, and redemption rights differ sharply between issuers and matter most under stress.
- Sending a stablecoin over the wrong blockchain network, since the same token name exists on many chains and a mismatched network can lose funds permanently.
- Yield offers on stablecoins are not savings accounts; those platforms lend the deposit out and carry credit and platform risk without deposit insurance.
Related terms
Part of
What are stablecoins, NFTs and tokenized assets? — the subject page for stablecoins and tokenization, with all 4 of its definitions in one place.
Educational only — not financial advice.