Tether, the most common stablecoin, now has support on Coinbase (USDT) With a market cap of $52 billion, Tether is the most commonly used stablecoin. The market for the Tether stablecoin has recently surpassed previous peaks. Except for New York, USDT assistance will be required in all jurisdictions, according to the exchange. More offerings that can appeal to both retail and institutional players are being actively pursued by the group.