What Is Tether (USDT) and Why It Dominates the Stablecoin Market

Tether (USDT) is the leading stablecoin, pegged 1‑to‑1 to the U.S. dollar and backed by a mix of cash, Treasury bills and other assets [1]. By early 2024 it held nearly $99 billion in market capitalization, making it the third‑largest cryptocurrency by value and the most widely used token for exchange transactions [1].

Key takeaways

• USDT is a dollar‑pegged stablecoin that aims to keep its price at $1 [1]
• It commands about $99 billion in market cap, the largest of any stablecoin [1]
• Tether’s reserves are disclosed daily, showing roughly 84 % in cash and short‑term assets [1]
• The firm has faced regulatory fines, including a $41 million CFTC penalty in 2021 [1]
• Tether led a $3 million equity investment in fintech Mansa, a liquidity provider for cross‑border payments [2]

Tether’s Scale, Transparency and Legal Scrutiny

Tether was launched in 2014 as RealCoin and rebranded later that year; it now operates on multiple blockchains, including Bitcoin’s Omni protocol, Ethereum, Tron and Solana [1]. The token’s popularity stems from its stability: traders and DeFi platforms use USDT as a bridge between volatile cryptocurrencies and fiat dollars. Daily reserve reports posted on Tether’s website show assets of $99.45 billion as of March 3 2024, with cash, cash equivalents and short‑term Treasury bills comprising the bulk of the holdings [1]. Although the company claims each USDT is fully backed, the reserve composition indicates that not all assets are cash‑equivalent, a point highlighted by regulators [1].

Regulatory challenges have punctuated Tether’s growth. In 2021 the U.S. Commodity Futures Trading Commission fined the firm $41 million for misrepresenting the extent of its dollar backing, noting that sufficient fiat reserves existed for only 27.6 % of days in a 26‑month sample [1]. Earlier, the New York Attorney General secured a settlement that required Tether to cease trading with New York residents and to provide reserve information for two years [1]. Despite these issues, Tether has generally honored its redemption promise, rebounding quickly after a brief dip to $0.96 in May 2022 [1].

Tether’s Expansion into Payment Liquidity

Beyond its core stablecoin business, Tether is investing in infrastructure that expands the use of USDT. In February 2025 the firm led a $3 million equity round in Dubai‑based Mansa, a startup that offers a revolving line of credit in stablecoins to payment companies, primarily across Africa [2]. The seed round also included $7 million of liquidity sourced from DeFi platforms, quant funds and family offices, positioning Mansa to extend its services into Latin America and Southeast Asia [2]. Mansa’s co‑founders argue that Tether’s market dominance and broad accessibility make USDT the preferred on‑chain liquidity source for emerging‑market payments [2].