What is Stablecoin?

A cryptocurrency designed to hold a fixed value, usually $1, by being backed by reserves — the cash of the crypto market.

A stablecoin is a cryptocurrency engineered to hold a constant value, almost always one US dollar. The main design backs each token with reserves — cash, bank deposits and short-term US government debt — held by the issuer, so a token can always be redeemed for a dollar. USDT (Tether) and USDC are the dominant examples. Stablecoins exist because the crypto market needed a unit that does not swing: a place to park value between trades without leaving the exchange or touching a bank.

In practice stablecoins are the plumbing of crypto trading. Most trading pairs are quoted against them, profits are banked into them, and in countries with weak local currencies they double as informal digital dollars. The risks are specific rather than obvious: an issuer whose reserves are weaker than claimed, a regulatory action freezing redemptions, or — in the case of algorithmic designs without real reserves — total collapse, as TerraUSD demonstrated in 2022. A stablecoin is only as stable as what actually backs it.