A stablecoin is a cryptocurrency designed to hold a steady value, almost always pegged one-to-one to a fiat currency such as the US dollar. It aims to combine the stability of traditional money with the speed of crypto, serving as a unit of account and a place to sit between trades.
How the peg is maintained varies, and so does the risk. The safest are fully backed by reserves of cash and short-term government debt; others rely on a basket of crypto collateral, and a few have tried to hold their peg through algorithms alone — a design that has failed spectacularly before.
"Stable" describes the goal, not a guarantee. A stablecoin is only as sound as the assets behind it and the integrity of its issuer, and pegs have broken under stress. The quality of the backing, not the label, is what matters.
Worked example
A US-dollar stablecoin aims to always be worth $1, letting traders park funds without converting back to a bank account.
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This definition is general education, not investment advice. Markets — especially crypto — are volatile and you can lose money. Please read our disclaimer and see our methodology.