Tether

There is a peculiar irony sitting at the heart of the cryptocurrency project. An industry born from a distrust of central banks and fiat promises has, over the past decade, come to depend almost entirely on a single privately issued dollar substitute. Ask any trader on any exchange, in any time zone, what they use to move in and out of bitcoin or ether at three in the morning, and the answer is invariably the same three letters: USDT.

Tether was never supposed to be interesting. That was rather the point. A stablecoin, pegged one-to-one with the US dollar, is meant to be the dull plumbing of a volatile market — the place traders park value while the more exciting assets do their gyrating. Yet few instruments in finance have attracted quite so much scrutiny, speculation and outright suspicion while quietly becoming so indispensable. It is this tension, between utility and unease, that defines Tether’s story.

To understand why it matters is to understand how crypto actually functions day to day, not how its evangelists describe it in white papers. And that requires going back to where it began.

The story so far

Tether’s origins trace back to 2014, under the name Realcoin, founded by Brock Pierce, Reeve Collins and Craig Sellars. The idea was disarmingly simple: issue a digital token backed by reserves of actual dollars, so that one USDT could always, in theory, be redeemed for one US dollar. Rebranded as Tether later that year, it was built atop the Bitcoin blockchain using the Omni Layer protocol, a modest technical footnote to what would become a vast enterprise.

The company’s fortunes became inseparable from those of Bitfinex, the Hong Kong-based exchange with which it shared management and, for a time, banking arrangements. When Bitfinex lost access to its banking partners in 2017 amid a wider crackdown on crypto-linked accounts, questions began circulating about whether Tether’s reserves were genuinely sufficient to back the tokens in circulation. Those questions have never entirely dissipated, even as the company has grown into one of the most systemically important entities in digital finance.

A pivotal moment arrived in 2019, when the New York Attorney General’s office alleged that Bitfinex had used Tether reserves to cover an $850 million shortfall, concealed from investors. The case was settled in 2021 without an admission of wrongdoing, alongside a separate settlement with the Commodity Futures Trading Commission over misleading statements regarding reserve backing. Rather than crippling the project, these episodes seemed only to accelerate its expansion, as traders across an increasingly multi-chain ecosystem adopted USDT on Ethereum, Tron and beyond as the default unit of dollar-denominated liquidity.

Today Tether commands a market capitalisation above $184 billion, with roughly 184.3 billion tokens in circulation, a scale that dwarfs its rivals and rivals many national currencies in terms of transactional throughput. Its all-time high, a brief overshoot to $1.2155 during a period of acute market stress, is itself a curiosity: proof that even a dollar peg can wobble when the plumbing is tested hard enough.

The case for Tether

Believers point, reasonably enough, to sheer utility. USDT has become the de facto settlement layer of global crypto trading, offering a way to hold dollar-equivalent value without touching the traditional banking system, a genuine boon for users in economies with capital controls or unstable local currencies. Its liquidity across exchanges is unmatched, which in practice means lower slippage and faster execution for traders who need to move value quickly.

Tether’s issuer has also, in recent years, published more frequent attestations of its reserves, shifting the composition towards short-term US Treasury bills rather than the murkier commercial paper holdings of its earlier years. Supporters argue this represents genuine institutional maturation, that a company once run like a scrappy offshore start-up has become, out of necessity, something closer to a disciplined money-market operator, generating substantial profits from the yield on its reserves while maintaining the peg through years of market turbulence.

There is also the network effect argument: whatever one thinks of Tether’s governance, its sheer ubiquity has become a form of stability in itself, since liquidity begets liquidity, and a mass exodus would be disruptive for everyone, which paradoxically discourages exactly that.

The case against Tether

Sceptics, for their part, have never fully accepted the reassurances. Tether has still not undergone a full independent audit by a major accounting firm, relying instead on periodic attestations that confirm reserves at a point in time without the rigour of a comprehensive audit trail. For an instrument this systemically significant, critics argue, that gap in transparency is not a minor bureaucratic quibble but a fundamental unresolved question.

There are also broader concerns about concentration and control. A private company, domiciled offshore and largely outside the direct purview of the regulators who oversee equivalent dollar instruments, issues a token that now functions as critical infrastructure for the entire digital asset economy. Should confidence in Tether’s backing ever falter seriously, the contagion risk to exchanges, lending platforms and the wider market would be considerable, a scenario regulators in Washington, Brussels and beyond have flagged with increasing urgency as they draft stablecoin-specific rules.

Finally, there is the matter of Tether’s use beyond simple trading convenience, with law enforcement agencies periodically citing USDT’s role in illicit finance and sanctions evasion, a reputational burden the company disputes but has struggled to entirely shake.

The bottom line

Tether occupies an odd position in modern finance: too large to ignore, too opaque to fully trust, and yet too embedded to easily replace. Its history is one of recurring controversy followed by continued dominance, a pattern that has held for a decade and shows little sign of breaking. Whether that reflects genuine resilience or simply the absence, so far, of a sufficiently severe test remains the question that hangs over every dollar of USDT in circulation. This article is journalism, not financial advice.