$USDC The USD Coin (USDC) from Circle remains the center of attention both in market growth and regulatory changes. U.S. legislation is moving quickly: the U.S. Senate recently passed the bipartisan GENIUS Act on June 17, 2025, requiring stablecoin issuers like Circle to maintain full and transparent reserves in liquid assets and to be subject to federal oversight, including registration and audits. The bill is now heading to the House.