Stablecoin

A stablecoin is a cryptocurrency engineered to maintain a stable price, typically by pegging to a fiat currency such as the US dollar. Fiat-collateralized stablecoins hold reserves (cash, short-term government debt) and rely on the issuer’s solvency and redemption process; crypto-collateralized ones lock excess crypto as backing and can be liquidated if collateral falls; algorithmic ones use supply mechanics and have historically proven fragile. The peg holds only as long as reserves are real and redeemable and the market trusts them — de-pegging events, where the token trades meaningfully away from its target, are a recurring risk that depends on issuer transparency and counterparty quality.

In plain English — A stablecoin is a token that aims to keep a fixed value — most commonly $1 — so it can be used for trading, settlement, and parking value without the wild swings of other crypto. Some are backed by reserves of cash and bonds (fiat-collateralized), some by other crypto (over-collateralized), and some by algorithms. The peg is a design goal, not a law of nature: stablecoins can and have "de-pegged" away from their target.

You sell a BTC position into a dollar-pegged stablecoin to sit in cash without leaving the exchange. Each token is meant to be worth $1 — but in a 2022 episode one large algorithmic stablecoin collapsed from ~$1 to near zero, and even reserve-backed coins have briefly traded at $0.95 during banking scares.