What Is Stablecoin?
A stablecoin is a cryptocurrency designed to maintain a stable value, typically pegged to the US dollar at $1.00. Stablecoins solve the volatility problem in crypto — they provide a stable unit of account for trading, a safe haven during downturns, and a medium of exchange for DeFi. Major stablecoins include USDT (Tether), USDC (Circle), DAI (MakerDAO), and USDS.
How Stablecoin Works
Stablecoins maintain their peg through different mechanisms: fiat-backed (USDT, USDC — each token is backed by $1 in reserves), crypto-backed (DAI — over-collateralized by crypto deposits), and algorithmic (various mechanisms to expand/contract supply based on demand). Each type carries different risks: fiat-backed relies on the custodian's solvency, crypto-backed can face cascading liquidations, and algorithmic can depeg catastrophically (Terra/UST).
Why It Matters for Traders
Stablecoins are the base currency of crypto trading. Most trading pairs are quoted against USDT or USDC. The total stablecoin supply is a macro indicator — growing stablecoin market cap signals fresh capital entering crypto, while shrinking supply signals outflows. Monitoring stablecoin flows to exchanges is one of the most direct indicators of imminent buying pressure.