What is USDT? The Expert Guide

In this guide, we'll discuss what USDT is, how it works, why it holds value, its advantages, disadvantages, its history and its future applications. Most importantly, we’ll explain how users can start earning interest on their USDT holdings.

What Is Tether (USDT)?

Tether, or USDT, is a dollar-pegged stablecoin issued by Tether Holdings. As of November 24, 2025, it has a market cap of $184 billion, and is used across the globe, including in countries where the US dollar is not the dominant currency, such as Europe, some regions in Africa, and heavily throughout Asia.

How Does USDT Work?

USDT's stability comes from its reserves. Tether Limited, the company, holds an equivalent or greater value in US dollars or assets for each USDT in circulation. Tether does not use algorithmic price stabilization; it relies on reserves and market arbitrage, as per its reserve data on its transparency page. 

Why Does USDT Have Value?

USDT maintains its value through a 1:1 peg to the US dollar. This potential stability is especially valuable in emerging markets, where local currencies can be volatile. However, there is some nuance to this - value depends on confidence in the issuer, along with liquidity. 

For instance, if trust in Tether dropped significantly, it could lead to uncertainty, which would affect USDT’s value. Some argue this nearly happened several years ago, when USDT was coming under pressure to be more open about its holdings.

In crypto, no value is ever guaranteed, even with stablecoins, there is a serious risk of the asset facing devaluation, or depegging, which can negatively affect a user’s finances.

Why Buy USDT?

Let’s take a look at the top reasons to buy USDT:

Access to potential stability when day-trading: Day-traders hold USDT so they can make quick purchases of cryptocurrencies without having to constantly convert fiat. It allows for faster activity in the market. That being said, no stablecoin is fully impervious to depegging, where the price no longer matches USD.

Global remittance: Some countries have inefficient (and occasionally inaccessible) banking systems. Therefore, it makes sense to use USDT as an alternative with 24/7 availability. Cryptocurrencies like Bitcoin or Ethereum are sometimes used, too, but their volatility can be unappealing when it comes to remittance.

On and off-ramping: Buying and selling cryptocurrency can be a long and complex experience. Even in countries that are crypto-friendly, it is often a multi-step process. Holding USDT significantly simplifies this. 

Note that in times of extreme market stress, converting USDT back to fiat (or withdrawing from a yield account) could be delayed or halted.

Yield possibilities: Holding USDT in a Growth Account, or providing it as liquidity in DeFi cryptocurrency markets, gives the ability to earn interest in some conditions. Some people do this as a means of generating yield, which incurs different risks compared to actions like day-trading. However, the reality is that there are always risks when engaging in financial activity of this sort - while yield opportunities may exist in some settings, there is still a serious risk of loss.

Note that counterparty and liquidity risks exist with trying to access finances via yielding.

Advantages of USDT

USDT offers numerous advantages, such as maintaining a generally consistent value during times of crypto market volatility. It is backed by a mix of fiat and other asset reserves, and users can even earn rewards through platforms like Ledn. USDT operates on multiple blockchains, facilitating faster global transactions.

1. Stability (Compared to Traditional Cryptocurrencies) During Market Volatility

USDT acts as a potential anchor against crypto market turbulence by attempting to maintain a strict 1-to-1 peg with the US dollar.

2. Multi-Chain Support and Ubiquity

USDT is supported by a range of blockchains, including Ethereum, Solana, TRON, Polygon, and others.

3. Access Interest-Bearing Accounts

Holders can turn their idle funds into income-generating assets by earning interest through Growth Accounts on platforms like Ledn, or other similar styled-accounts elsewhere.

4. Fast Global Transactions

The token’s multi-chain availability streamlines cross-border payments, making international commerce and money transfers significantly faster and more efficient.

Who Runs USDT?

Tether created USDT in 2014. It is owned by iFinex Inc., which also owns the cryptocurrency exchange Bitfinex. While historically linked to Hong Kong, the company is incorporated in the British Virgin Islands and recently moved its headquarters to El Salvador.

It has faced controversy in the past regarding allegations of Bitcoin price manipulation and reserve management, though it now publishes quarterly reports claiming to be backed by US Treasuries and gold based on attestations. The company offers stablecoins tied to other currencies, including the Euro (EURT), Mexican Peso (MXNT), Chinese Renminbi (CNHT), and a planned UAE Dirham token, as well as gold (XAUT).

What is USDT Backed By?

USDT is backed by a 1:1 equivalent value in US dollars. This does not mean there is one dollar in reserve for every USDT, but also includes other cash equivalents, assets or investments which are highly rated. Their September 2025 auditor’s report reveals that, along with fiat, their reserves are in US treasury bills, overnight reserve repurchase agreements, term reserve repurchase agreements, corporate bonds, precious metals, Bitcoin, secured loans, and several other investments.

Note that Tether’s reports are attestations, not independent financial audits. Tether has not undergone a full, independent audit, which limits the ability to fully verify its current financial standing and the exact composition of its reserves.

The History of USDT

The Beginning 

Tether (USDT) was founded in 2014 to bridge the gap between traditional finance and the crypto ecosystem. Its primary goal was to offer a digital asset that maintained a consistent value, contrasting with the extreme volatility of the crypto space.

Integration with Major Crypto Exchanges

A turning point occurred when major exchanges integrated USDT. This drove global adoption, making it the standard tool for traders to manage portfolios and navigate markets efficiently.

Challenges and Controversies

USDT has faced significant scrutiny regarding the transparency of its reserves, leading to investigations by the NYAG and CFTC in 2021.

Depegging issues

USDT has faced depegging several times - one notable example is when the algorithmic stablecoin TerraUSD collapsed to zero. This led to fears across the stablecoin market, where many competitors, including USDT and USD Coin (or USDC), were treated with increased scrutiny. The result was the asset dropping to $0.95. While this may seem like a small difference, any form of instability reduces the asset’s purpose and therefore can damage its reputation. Additionally, changes like this could happen again in the future, as the market is deeply unpredictable, and stablecoins are still a relatively novel concept.  

The Future of USDT

Looking ahead, USDT is likely to continue adapting to evolving market dynamics, solidifying its important position in the crypto ecosystem. Its versatility and attempted stability make a number of applications possible.

These other applications include:

• Facilitating cross-border transactions.
• Seamless integration with decentralized finance (DeFi) protocols, supporting liquidity and collateralization.
• Increasing the number of blockchains supporting USDT.
• Adoption in global e-commerce and online payments, doubling as a store of value and hedging solution against crypto market volatility.
• Integration into diversified investment portfolios, bridging the gap between traditional and digital assets.

When discussing USDT’s future, it’s imperative to note that the regulatory environment for stablecoins is still developing globally, and future regulations could negatively impact USDT's utility, value, or legality in certain jurisdictions.

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How Ledn Growth Accounts Work With USDT

Users may be able to earn interest on USDT through platforms like Ledn. Ledn Growth Accounts currently offer a variable APY of up to 8% (rates are subject to change and market conditions, and returns are not guaranteed). 

Earning interest involves risks, including counterparty risk, liquidity risk, and potential loss of assets.

Ledn Growth Accounts involve lending digital assets to institutional borrowers. This exposes users to credit risk, meaning losses may occur if borrowers fail to meet their obligations.

Ledn uses USDT to provide loans for a vetted and trusted list of clients.

With Ledn, users get:

• Full visibility into how it generates interest, including Ledn's Open Book Report.
• Ledn structures its Growth Accounts so that these assets are distinct from its general corporate operations, meaning yield generation is tied specifically to the performance of vetted borrowing counterparties.
• It is the first digital asset lending company in the crypto industry to complete a Proof-of-Reserves attestation and execute them periodically every 6 months. 
• Users can transfer between Growth Accounts and non-interest-bearing Transaction Accounts.
• Client data is stored in private networks rather than local servers, and is not sold to third parties.

Conclusion

USDT remains the most widely used stablecoin thanks to its liquidity and utility. As with all stablecoins, safety depends on issuer transparency and choice of platform.

Disclaimer

This article is sponsored by 21 Technologies Inc. and/or its subsidiaries (“Ledn”) and is for general information, discussion, or educational purposes only and is not to be construed or relied upon as constituting legal, financial, investment, accounting, tax, estate-planning, or other professional advice or recommendation. Please read Ledn’s full Risk Disclosure Statement and Disclaimers.