The total stablecoin supply has crossed the $300 billion mark in 2025. The gains are flowing almost entirely to the players who were already winning, while the much-hyped wave of bank-issued and regulatory-compliant newcomers is barely registering on the scoreboard.
Tether’s USDT remains the undisputed heavyweight, commanding roughly 58% of the entire stablecoin market. That translates to a supply figure approaching $190 billion, according to DeFiLlama’s latest data. For context, the entire stablecoin market sat around $205 billion earlier this year, meaning USDT alone is now worth nearly as much as the whole sector was just months ago.
The $100 billion surge and who captured it
The stablecoin market has added nearly $100 billion in supply over the course of 2025. Banks and fintech firms have rushed to launch stablecoins designed to comply with the GENIUS Act framework, hoping that regulatory legitimacy would be their competitive edge. The newcomers have had a harder start than many expected, failing to peel meaningful market share away from USDT or Circle’s USDC.
The World Economic Forum has recognized stablecoins as integral to transactions valued in the trillions of dollars, with a projected market cap of around $300 billion by 2026. The market hit that number ahead of schedule, reflecting the velocity of adoption in trading, settlement, and on-chain payments.
Why the GENIUS Act hasn’t been a great equalizer
The GENIUS Act was supposed to create a clear regulatory pathway that would let traditional financial institutions compete on a level playing field with crypto-native issuers. Trust in the stablecoin world is measured in liquidity depth on exchanges, in the number of trading pairs denominated in your token, and in how many DeFi protocols accept your stablecoin as collateral. USDT has spent years building that kind of structural trust. A bank-issued stablecoin launching in 2025 is essentially starting from zero on all of those dimensions.
USDC, the second-largest stablecoin issued by Circle, has carved out its own niche by leaning into transparency and US regulatory compliance. But even USDC hasn’t been able to close the gap with Tether in any meaningful way.
What this means for investors
Stablecoin growth has historically correlated with increased trading activity and capital inflows into digital assets. For Tether specifically, USDT’s market share has proven remarkably sticky despite years of scrutiny over its reserves and transparency practices. If incumbents continue capturing essentially all of the market’s growth, it suggests that the stablecoin market may be settling into a durable oligopoly structure, with USDT and USDC together accounting for the vast majority of all stablecoin supply.
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