Stablecoins are the connective tissue of the crypto economy. They let traders move in and out of volatile positions without converting back to fiat currency. They serve as the base pair on most exchanges. And they power the majority of DeFi lending, borrowing, and liquidity provision. The total stablecoin market cap exceeds $150 billion, making this category one of the most systemically relevant in crypto.
Tether (USDT) dominates with the largest market cap and the most trading volume of any cryptocurrency, period. It is deployed across more than a dozen blockchains, with TRON and Ethereum being the two largest networks by USDT supply. Tether backs its tokens primarily with US Treasury bills, though its reserve transparency has been a persistent point of debate in the industry.
USDC, issued by Circle, positions itself as the regulated alternative. Circle holds reserves in cash and short-duration Treasury securities, publishes monthly attestation reports from a Big Four accounting firm, and operates under US money transmitter licenses. USDC briefly depegged in March 2023 when $3.3 billion of its reserves were held at the collapsed Silicon Valley Bank, though it recovered within days.
DAI takes the decentralized route. Governed by MakerDAO, DAI is minted when users deposit crypto collateral into Maker vaults. It cannot be frozen or blacklisted by a central authority, making it the preferred stablecoin for users who prioritize censorship resistance. MakerDAO has also diversified DAI's backing to include real-world assets like Treasury bills.
The newest entrants reflect institutional interest in the stablecoin space. PayPal USD (PYUSD) launched in 2023, backed by PayPal's regulatory infrastructure and available to its 400+ million users. EURC, also from Circle, targets the European market with a euro-pegged token compliant with MiCA regulations. FRAX pioneered the hybrid model, combining algorithmic mechanisms with collateral backing to maintain its peg.