Stablecoins have quietly become one of the largest payment rails in the world, settling more than $18 trillion in 2025, surpassing both Visa and Mastercard. What started as collateral for crypto trading has evolved into flows serving remittances, merchant settlement, and B2B payments. Particularly in markets where local currency instability makes dollars on-chain both more functional and a store of value. Despite processing trillions in volume, stablecoins remain second-class citizens on the chains that host them. Ethereum, Tron, Solana, and others were designed as general-purpose smart contr...