Stablecoins surge past $300 billion, forcing a reckoning over the dollar’s future

The stablecoin market has ballooned to roughly $300-322 billion in total capitalization, more than doubling from approximately $124 billion at the end of 2023. Most of that supply sits in just two tokens. Tether’s USDT commands around $180-190 billion, or roughly 60% of the market, while Circle’s USDC holds about 24% at $73-77 billion. Together they account for an estimated 83-85% of all stablecoins in circulation. Non-dollar stablecoins, for all the talk of euro or yuan alternatives, represent less than 0.5% of the total. The GENIUS Act changed the rules The regulatory picture shifted dramatically in July 2025 when the GENIUS Act was signed into law. The legislation created a federal framework allowing approved institutions to issue stablecoins backed one-to-one by dollar-denominated assets, typically short-term Treasury bills. Stablecoin issuers like Tether now hold substantial portfolios of Treasury bills to back their tokens. Under various growth forecasts, that demand for US government debt could reach hundreds of billions, or even trillions, by 2030. Treasury Secretary Scott Bessent has argued this creates a structural bid for American debt, one that could push yields lower a...