In a space defined by volatility, USDT serves as the calm center. With a market cap near $154.7 billion, Tether is the third-largest cryptocurrency and controls over 65% of the stablecoin market. But what exactly is USDT, and how did it become so dominant? Here are the facts based on publicly available information.
What Is Tether (USDT)?
Tether is a stablecoin designed to maintain a 1:1 peg to the US dollar. Launched in 2014 as Realcoin, it later rebranded and issued its first tokens on the Bitcoin blockchain via the Omni Layer Protocol. Besides USD₮, Tether also offers MXN₮ (pegged to Mexican peso), CNH₮ (offshore Chinese yuan), and XAU₮ (backed by one troy ounce of gold). USDT now runs on Ethereum, Tron, Solana, Cosmos, and other networks.
How USDT Maintains Stability
When users deposit fiat, Tether Limited mints an equivalent number of USDT tokens; redemptions destroy tokens, reducing supply. Reserves include cash equivalents, corporate bonds, and Treasury bills. Unlike algorithmic stablecoins, USDT relies on centralized reserve control. Tether publishes quarterly attestations but has never undergone a full independent audit under GAAS.
Key Use Cases
Traders use USDT to exit volatile positions without converting to fiat, avoiding banking delays. In bear markets, investors park capital in USDT as a safe haven. It facilitates fast exchange-to-exchange transfers for arbitrage. In DeFi, USDT powers lending pools and yield farming. Cross-border remittances, especially in Latin America and Southeast Asia, bypass banking restrictions using USDT.
Major Controversies and Regulatory Actions
In 2021, the New York Attorney General revealed Tether had misrepresented its backing and secretly loaned funds to cover an $850 million loss at Bitfinex. Tether settled for $18.5 million and was banned from operating in New York. That same year, the CFTC found that between 2016-2018, USDT was fully backed only 27.6% of the time. Tether still lacks a full GAAS audit, casting doubt on its 1:1 claim.
USDT vs. USDC vs. DAI
USDC provides full audits by Grant Thornton, offering higher transparency; USDT only offers attestation snapshots. Compared to DAI, a decentralized stablecoin, USDT is fully controlled by a single company, creating a central point of failure and the ability to freeze funds — a trade-off between efficiency and decentralization ideals.
As of June 2025, approximately 154.76 billion USDT tokens are in circulation. Supply adjusts with demand: during bull markets, minting increases; during downturns, redemptions shrink it. Real-time data is available on CoinMarketCap and Tether’s transparency dashboard.