Stablecoin

What Stablecoin means

A stablecoin is a token engineered to track the price of something stable, almost always a major fiat currency. Three designs dominate. Fiat-collateralised coins are backed by reserves of cash and short-term government debt held by an issuer, who redeems tokens for currency on demand. Crypto-collateralised coins are backed by other crypto assets locked in smart contracts and deliberately over-collateralised, so a fall in collateral value triggers liquidation. Algorithmic coins hold the peg by expanding and contracting supply through incentives rather than reserves.

Their purpose is practical. Stablecoins provide a unit of account inside crypto markets, let traders move out of volatile positions without leaving the blockchain, serve as the settlement asset for most derivatives and lending protocols, and enable transfers that clear in minutes at any hour. Because they can be moved between venues quickly, they also function as the working capital of the market, which is why the largest stablecoins account for a very large share of total trading volume.

Every design carries a distinct risk. Fiat-backed coins depend entirely on whether the issuer's reserves are real, liquid and properly segregated, which is a question of attestation quality and jurisdiction. Crypto-backed coins can fail if collateral falls faster than liquidations can execute. Algorithmic stablecoins have failed outright in practice, most notably in 2022 when a large algorithmic coin lost its peg and collapsed within days, wiping out tens of billions of dollars. A peg is a design goal, never a guarantee.