What is Stablecoin?

A stablecoin is a cryptocurrency designed to maintain a stable value by pegging its price to a reference asset, most commonly the U.S. dollar, making it useful for trading, payments, savings, and as a bridge between traditional finance and crypto. Stablecoins are the most widely used category of cryptocurrency by transaction volume.

Stablecoins solve a fundamental problem: most cryptocurrencies are volatile, making them impractical for everyday transactions, payroll, or pricing goods and services. By maintaining a 1:1 peg with the dollar (or another stable asset), stablecoins offer the programmability and speed of crypto with the price stability of fiat currency.

There are three main types of stablecoins. Fiat-collateralized stablecoins are backed by reserves of traditional currency and equivalents held by a centralized issuer. USDT (Tether) and USDC (Circle) dominate this category, with a combined market cap exceeding $200 billion by 2026. Crypto-collateralized stablecoins are backed by cryptocurrency deposits locked in smart contracts, typically over-collateralized to account for volatility. DAI (issued by MakerDAO, now Sky) is the leading example. Algorithmic stablecoins use smart contract mechanisms to expand and contract supply to maintain the peg, without holding equivalent reserves. This model suffered a major credibility blow in 2022 when TerraUSD (UST) collapsed.

Stablecoins have become critical infrastructure for DeFi (as the primary trading pair and lending asset), cross-border remittances (faster and cheaper than traditional wire transfers), and emerging market savings (providing dollar access in countries with unstable local currencies).

Regulatory scrutiny of stablecoins has intensified globally. The EU’s MiCA framework, the U.S. stablecoin legislation efforts, and reserve transparency requirements are reshaping how stablecoin issuers operate. Proof-of-reserves attestations and regulatory compliance are increasingly expected by both users and institutions.

Last updated: April 2026