Stablecoins Market Reaches $316B as USDT Maintains Dominance Amid Modest Growth

The stablecoin sector climbs to $316B with USDT at 58% share; top five stablecoins account for 89% of the market, per Defillama data as of March 21, 2026.

Rich by Coin

2026-03-21

The stablecoin economy continued its ascent in March, pushing total value to roughly $316 billion as of March 21, up by about $124.9 million over the prior week. Tether’s USDT dominates with a 58.25% share of the market, while the sector rose 0.04% week over week and 2.49% over the past month, according to Defillama data.

USDT remains the market anchor, with a market cap of $184.119 billion at the weekend and a modest weekly gain of about 0.06%. Circle’s USDC slipped 0.19% as roughly $150 million exited, leaving USDC at $79.091 billion. Sky dollar (USDS) rose 2.41% to $8.245 billion, while Ethena’s USDe edged up 0.04% to $5.923 billion on inflows of about $2.11 million. Sky’s DAI sits at $4.569 billion, up 0.66% over seven days.

The top five stablecoins total about $282 billion, and the combined market share of USD1, PYUSD, BUIDL, USYC and USDG is expanding, with individual gains ranging from 0.69% to 7.41%. USD1 sits at $4.428 billion and PYUSD at $4.066 billion. Rounding out the top ten, BUIDL, USYC, and USDG posted gains as the fiat-pegged sector edged higher for three consecutive weeks, while USDT’s dominance eased below the 60% range.