What is Tether (USDT)?
The world's largest stablecoin — and the most traded crypto asset
What Tether (USDT) Actually Is
People say “stablecoin” like it is one product. It is not. USDT is an IOU from Tether Limited: you hold a token on-chain, and the company says it keeps assets that match what it owes. That simple framing matters more than any slogan about “digital dollars.”
Tether launched in 2014 (then “Realcoin”) and rebranded to USDT. iFinex — the same group behind Bitfinex — sits at the top of the corporate stack. Today USDT routinely tops both stablecoin market cap and reported spot volume. In early 2026, circulating USDT is on the order of $140–150 billion, which is multiple times larger than its nearest fiat-backed competitor.
Traders use it because counterparties accept it. Liquidity begets liquidity: the pair you want is usually quoted against USDT, and the transfer rail you need (often Tron TRC-20) is cheap enough for size.
How the Peg Usually Sticks Around $1
Tether publishes reserve breakdowns in quarterly attestations (BDO among the firms used). The mix has shifted toward short-dated U.S. Treasuries and away from the commercial-paper-heavy years that drew scrutiny. Skeptics focus on what attestations do not show; traders focus on whether they can exit near par.
In practice the peg is reinforced by arbitrage and by depth. If USDT prints below $1.00 in a stressed market, entities with direct redemption access have an incentive to buy cheap tokens and redeem at par — if redemption rails stay open. If USDT trades above $1.00, minting and selling absorbs premium. Retail mostly experiences this as “it’s a dollar” until a crisis proves otherwise.
Same Ticker, Different Rails
USDT is not “one chain.” It is the same accounting concept copied across networks: Tron (TRC-20) still carries a huge share of transfer volume because fees are tiny. Ethereum ERC-20 USDT is the DeFi default but can get expensive at the gas margin. Solana, Arbitrum, BNB Chain, and others each have their own token contract.
Pick the wrong network when withdrawing and you learn a painful lesson: the address format may look compatible, the token is not. Double-check the chain ID in your wallet before you confirm.
What Can Go Wrong (and Already Has, in Court Filings)
Issuer and banking risk: You rely on Tether’s solvency, internal controls, and the banks/custodians it uses. That is different from holding cash in an insured account.
Legal and regulatory risk: Tether settled with the New York Attorney General in 2021 ($18.5 million) over past representations tied to reserves and related-party transactions. Future rules for stablecoins could change who may issue, hold, or transfer USDT in specific jurisdictions.
Blacklist risk: USDT contracts include freeze capability. Law enforcement pressure and compliance decisions can strand an address.
Transparency limits: Quarterly attestations are not a Big Four audit trail. Read them for what they are: snapshots with procedures disclosed by the issuer.
USDT on GaiaEx
On GaiaEx, USDT is a standard quote asset for many markets. The exchange never takes custody: you connect a wallet that already holds USDT on a supported network, sign swaps or perp margin flows, and settlement stays verifiable on-chain.
Pair that with plain hygiene — diversified stablecoin exposure, sane leverage, and awareness of issuer risk — and USDT is usable without pretending it is a government guarantee.
