《大国博弈》系列第八十八篇：稳定币：从数字美元到霸权上链

Group 1: Nature and Market of Stablecoins - Stablecoins are essentially "on-chain" dollars, designed to mitigate cryptocurrency market volatility and enhance payment efficiency[1] - As of July 24, 2025, the total market capitalization of stablecoins exceeded $270 billion, with USDT and USDC accounting for approximately 62% and 24% of the market, respectively[12] - USDT and USDC dominate the market, representing about 90% of stablecoin trading volume and 80% of market value[2] Group 2: Issuer Profit Models - Stablecoin issuers profit from the interest rate spread, as they do not pay interest on the stablecoins held by users[2] - Tether's reserve assets consist of approximately 80% in U.S. Treasury bonds and cash, while Circle's reserves are primarily in U.S. Treasury bonds and cash, leading to lower but safer returns[2] - Tether reported a net profit of approximately $13 billion in 2024, with $7 billion from U.S. Treasury investments and $5 billion from Bitcoin and gold holdings[50] Group 3: Regulatory Framework - The U.S. "GENIUS Act" mandates that stablecoins must be backed 100% by cash or short-term U.S. Treasury securities, with a diverse regulatory body overseeing compliance[3] - The EU's "MiCA Act" aims for unified regulation across member states, focusing on risk prevention and maintaining financial sovereignty[34] - Hong Kong's "Stablecoin Ordinance" emphasizes strict approval processes and a 100% reserve requirement, allowing for a more inclusive approach to stablecoin issuance[40] Group 4: Macro Implications - Dollar-backed stablecoins expand the functionality of the dollar, reinforcing its dominance in the international monetary system[4] - The growth of stablecoins poses new challenges for central banks in managing liquidity, as they can significantly increase the velocity of money circulation[4] - The expansion of stablecoins could exacerbate the U.S. government's long-term debt issues, as they are primarily tied to short-term bonds[4]