$USDC USDC (USD Coin) is a fully-backed stablecoin that offers the stability of the U.S. dollar with the speed and efficiency of blockchain technology. Built for global payments and digital finance, USDC is widely trusted due to its transparency, with regular audits and full 1:1 backing by cash and short-term U.S. treasuries. Whether you're sending money across borders, trading, or participating in DeFi, USDC provides a secure, fast, and cost-effective solution for modern digital transactions.