Circle is ramping up issuance of its USD Coin, minting roughly 750 million USDC on the Solana blockchain in the past 24 hours and about $5.5 billion over the last month, according to blockchain data cited by SolanaFloor and Cointelegraph. The company also created about $400 million on Ethereum, lifting total daily issuance to more than $1 billion. The latest mints included two $500 million transfers from Circle Treasury to Coinbase on Solana, executed in 1.7 seconds at a network cost of just $0.28. The speed and low fees are feeding institutional interest in using Solana for large-scale stablecoin transactions. Exchanges are moving to cut user costs as stablecoin volumes swell. Coinbase said it is reducing USDC fees for MetaMask wallets on its Base layer-2 network and, together with payments provider Mercuryo, plans to lower on-ramp charges for USDC by about 50%. The burst of activity underscores the rapid expansion of the stablecoin market. Axelar estimates total stablecoins in circulation now exceed $250 billion, while market-maker Keyrock projects annual stablecoin payments will top $1 trillion by 2030, led by issuers such as Circle.