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Stablecoin supply has moved above $300 billion, but the latest growth is concentrating around Tether as rivals struggle to keep pace.
On May 19, total stablecoin supply surpassed $300 billion even as overall growth slowed. The data also showed Tether gaining share at the expense of competing issuers.
USDT Circulation Reaches $189.5B
Tether remains the largest stablecoin issuer by a wide margin. On May 1, USDT had $189.5 billion in circulation, while Tether’s first-quarter attestation showed about $183.4 billion in token-related liabilities as of March 31.
Tether also said USDT circulation increased by more than $5 billion in April, pointing to continued demand moving into the second quarter. That scale gives Tether a major liquidity advantage. Exchanges, traders and payment firms tend to favor the stablecoin with the deepest market access and widest trading support.
$300B Stablecoin Market Grows Unevenly
The stablecoin market is still expanding, but the latest data suggests growth is no longer broad-based. Crossing $300 billion remains a major milestone for stablecoins as a category. They are now widely used across crypto trading, DeFi, payments, remittances and treasury movement.
But slower aggregate growth changes the signal. Instead of new supply lifting the whole market evenly, recent changes show USDT taking a larger share of the increase. That matters because stablecoin supply is often treated as a proxy for crypto liquidity. A more concentrated supply base can still support deep markets, but it also shows liquidity is becoming more selective.
USDC Grows 72% But Trails Tether’s Lead
Tether’s lead does not mean rivals have stopped growing. In February, USDC circulation rose 72% to $75.3 billion, showing continued demand beyond USDT. The challenge is that smaller issuers now face a tougher competitive phase.
They may need to compete on regulation, payments integration, regional distribution and product design rather than liquidity alone. For now, the latest supply data shows a bigger stablecoin market, but one where growth is increasingly concentrated around Tether. The sector has crossed $300 billion, yet the next phase looks more like a market-share fight than a broad-based expansion.
