Circle's USDC stablecoin outpaced Tether's USDT in growth for the second consecutive year, driven by rising demand for regulated digital dollars following the GENUIS Act in the U.S. USDC's market cap increased by 73% to $75.12 billion, while USDT grew by 36% to $186.6 billion. Institutional interest in compliant assets is contributing to USDC's popularity among major financial institutions.