$USDC USDC is a stablecoin issued by Circle, pegged to the US dollar at a 1:1 ratio, known for its high transparency and compliance, with asset reserves audited by third parties. It is widely used in trading, payments, and the DeFi space, making it one of the most reputable in the stablecoin market. Although it is affected by policy changes and market competition, its compliance advantages contribute to long-term stable development.