Stablecoin
A cryptocurrency designed to maintain a stable value, typically pegged 1:1 to a fiat currency like the US dollar.
Stablecoins fall into three main categories. Fiat-backed (USDT, USDC) hold equivalent reserves of dollars and short-term securities; users trust the issuer to redeem at par. Crypto-backed (DAI) lock excess collateral in smart contracts to mint stable units. Algorithmic stablecoins (like the failed UST) use minting/burning mechanics with no real backing — historically prone to collapse.
USDT (Tether) and USDC (Circle) dominate, with combined market cap above $100B. They are the de facto trading-pair currency on most exchanges and the primary on-ramp from fiat to crypto. Most spot trading volume is denominated in stablecoins, not in actual USD.
Stablecoin supply growth and decline is a leading liquidity indicator. Issuance during bull markets reflects new capital entering crypto; redemptions during bear markets reflect capital leaving. Watching aggregate stablecoin supply is one of the cleanest macro signals for crypto.
Stablecoins are the cash-equivalent of crypto — the medium for trading and the gateway from fiat. Their supply changes track real money flowing in or out of the ecosystem.
How CryptoRadar24 tracks it
CryptoRadar24 surfaces stablecoin supply trends as part of broader liquidity and capital-flow analysis.
Related terms
FAQ
How does a stablecoin stay at $1?
Fiat-backed: 1:1 reserves and arbitrage redemption. Crypto-backed: over-collateralization and liquidation mechanics. Algorithmic: market dynamics of mint/burn — historically the least reliable.
Are stablecoins safe?
Fiat-backed are as safe as the issuer's reserves and regulatory standing. USDC has stronger transparency than USDT, though both have held peg through major stress. Algorithmic stablecoins have repeatedly failed.
Why do exchanges use USDT instead of USD?
USDT moves on crypto rails (instant, 24/7, global). Real USD requires bank intermediation — slower, business-hours-only, more compliance. USDT is functionally equivalent for trading purposes.
What is stablecoin depeg?
When the price drops below $1 due to redemption stress or fear of insolvency. USDC briefly dropped to $0.87 during the SVB collapse in March 2023; UST fell to zero in May 2022 and never recovered.