Stablecoins
Cryptocurrencies designed to maintain a stable value, usually pegged to USD.
In depth
Major: USDT (Tether), USDC (Circle), DAI. USDT/USDC backed by reserves of cash and short-term Treasuries; DAI is collateral-backed. Combined market cap exceeds $200B. Used for trading pairs, cross-border payments, and DeFi collateral. Regulatory scrutiny intensifying.