The history of Tether (USDT) is one of the most remarkable stories in cryptocurrency — a project that began as a niche experiment in 2014 and grew to become the most traded cryptocurrency in the world by daily volume, surpassing even Bitcoin.
2014: Launch as Realcoin
Tether was founded by Brock Pierce, Reeve Collins, and Craig Sellars. Initially launched under the name "Realcoin" in July 2014, it was rebranded to "Tether" in November of the same year. The first USDT tokens were issued on the Bitcoin blockchain using the Omni Layer Protocol. The concept was simple but revolutionary: a blockchain token that would always be worth exactly one US dollar.
2015–2017: Early Adoption
In 2015, Tether became available on the Bitfinex exchange, beginning a close relationship that would later attract regulatory scrutiny. From January 2017, the total USDT supply began growing rapidly as cryptocurrency markets entered a major bull cycle. By September 2018, supply had grown from approximately $10 million to $2.8 billion — a 280x increase in under two years.
2019: Becomes the Most Traded Cryptocurrency
By 2019, USDT had surpassed Bitcoin to become the most traded cryptocurrency by daily volume globally. This milestone reflected USDT's critical role as the primary vehicle for moving between cryptocurrencies without converting to traditional fiat currency, and its dominance in Asian trading markets.
2020–2022: DeFi Explosion and Controversy
The explosion of decentralized finance (DeFi) protocols in 2020 dramatically increased demand for USDT as a stable collateral asset and medium of exchange. In 2021, Tether settled with the New York Attorney General for $18.5 million and agreed to publish quarterly reserve reports — a watershed moment for reserve transparency. The collapse of the Terra/LUNA ecosystem in May 2022 briefly tested USDT's peg, which dipped to $0.96 before rapidly recovering.
2023–2024: Record Growth and Profitability
As interest rates rose globally, Tether's US Treasury-heavy reserve portfolio began generating enormous income. In the first half of 2024, Tether reported profits of $5.2 billion, driven by Treasury bill yields. The full year 2024 delivered record profits of $13 billion. By August 2024, the USDT market cap exceeded $114 billion with $118.4 billion in reserves.
2025–2026: $184 Billion and Beyond
By early 2026, USDT's market cap had grown to over $184 billion, with daily trading volumes regularly exceeding $50–60 billion. Tether relocated its headquarters to El Salvador in January 2025 and reported having more than 350 million users worldwide. The stablecoin's total supply across all blockchains surpassed $140 billion in 2025.
From $10 million in 2017 to $184 billion in 2026, Tether's growth reflects the global demand for a stable, blockchain-based US dollar equivalent.