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2025年7月16日

What Is Tether (USDT)? The Ultimate Guide to the World's Leading Stablecoin

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閱讀時長 5 分鐘

Key Takeaways

  • Tether (USDT) is a stablecoin pegged to the U.S. dollar, offering price stability in volatile crypto markets.
  • USDT is issued by Tether Limited and backed by a mix of fiat reserves and digital assets.
  • It plays a key role in crypto trading, DeFi, and global remittances.
  • Tether is the largest and most widely used stablecoin by market capitalization.


Introduction to Tether (USDT)

Tether (USDT) is a type of stablecoin—a cryptocurrency designed to maintain a stable value by being pegged to a real-world asset, usually a fiat currency. In this case, it's the U.S. dollar.

Launched in 2014, Tether aims to bring the benefits of cryptocurrency—fast, borderless transactions—with the stability of fiat. It's issued by Tether Limited, a company under iFinex, which also operates the exchange Bitfinex.

As of March 2024, USDT had a market cap of nearly $99 billion, ranking third behind only Bitcoin (BTC) and Ethereum (ETH).


How Tether (USDT) Works

Pegging and Reserves

USDT maintains its $1 value by being backed by reserves that include:

  • Cash and U.S. Treasury bills
  • Bitcoin and other digital assets
  • Precious metals
  • Secured loans and miscellaneous investments

While Tether claims full backing, not all of it is in cash—some assets carry risks or are not easily redeemable.

Blockchain Compatibility

Tether is supported across multiple blockchains:

  • Ethereum (ERC-20)
  • TRON (TRC-20)
  • Solana, Avalanche, Algorand, EOS
  • Bitcoin Omni & Liquid, Kava, Polkadot

This makes USDT highly versatile and integrated into most crypto ecosystems.


Why Use Tether (USDT)?

1. Stability Without a Bank

Unlike Bitcoin or Ethereum, USDT holds steady around $1, acting as a safe zone during crypto volatility.

2. Easy Crypto Conversions

Traders use USDT as a base trading pair to switch between different assets without cashing out to fiat.

3. Fast, Global Payments

Need to send money across borders? USDT enables instant, low-fee global transactions—no middlemen needed.

4. DeFi and Yield Farming

USDT is widely used in DeFi platforms for lending, borrowing, and staking to earn passive income.


A Brief History of Tether

2014 – The Beginning

Launched as RealCoin, it rebranded to Tether (USDT) and was first built on Bitcoin’s Omni Layer.

2017 – Major Hack

$31M in USDT was stolen. Tether responded with a hard fork to freeze the stolen funds.

2019 – Legal Troubles

The New York Attorney General accused Tether/Bitfinex of misusing $700M in reserves. Tether later settled, paying an $18.5M fine.

2021 – CFTC Crackdown

Tether paid a $41M fine after being found to have misrepresented reserve backing.

2022 – Terra Fallout

USDT briefly dropped to $0.96 after Terra’s UST collapsed, but quickly rebounded. Tether honored all redemption requests.

2023 – Growth and Expansion

Tether expanded into AI by acquiring Northern Data Group, appointed Paolo Ardoino as CEO, and won a lengthy court case.


Transparency and Reserves

Tether reports its reserves daily on its official website. As of March 2024:

  • 84.58% in cash equivalents & short-term deposits
  • 3.62% in precious metals
  • 2.91% in Bitcoin
  • 4.95% in secured loans
  • 3.89% in other investments

Note: Tether has improved transparency, but still lacks full third-party audits, which has drawn industry criticism.


How to Buy Tether (USDT)

You can buy USDT on most popular platforms:

  • Centralized Exchanges: Binance, Kraken, Coinbase, Bitfinex, CoinSpot
  • Decentralized Exchanges (DEXs): Using Ethereum or TRON
  • Mobile Wallets: Trust Wallet, MetaMask, Cregis Wallet

USDT is available in ERC-20, TRC-20, and other blockchain formats—choose based on fees and compatibility.


How USDT Compares to Other Stablecoins

StablecoinPegHighlights
USDTUSDHigh liquidity, multi-chain, widely adopted
USDCUSDFully regulated, transparent reserves
DAIUSDDecentralized, backed by crypto
BUSDUSDBinance-native, under regulatory review
USDT leads in volume and reach, but USDC and DAI offer better transparency or decentralization.


Is Tether Safe?

Pros:

  • Highly liquid
  • Widely accepted
  • Maintains peg under stress

Cons:

  • Past legal issues
  • Reserves not 100% fiat
  • Limited third-party audits


Conclusion: USDT is reliable for most use cases, but not risk-free. Diversification is key.


Final Thoughts

Tether (USDT) plays a critical role in the global crypto economy. Whether you're a trader, DeFi user, or sending remittances, USDT offers the stability of fiat with the power of blockchain.

It’s not without controversy—but it remains the most trusted stablecoin by volume, speed, and accessibility.

關於Cregis

Cregis成立於2017年,總部位於香港,是一家面向企業的數字資產基礎設施平台。過去九年間,Cregis已服務全球50多個國家和地區的4,000餘家企業客戶,涵蓋加密交易所、金融科技公司、支付服務商、數字銀行、經紀商及Web3企業等機構。

圍繞企業數字資產運營需求,Cregis構建了覆蓋錢包基礎設施(WaaS)、資金流編排(Rails)及合規託管能力(Custody)的產品體系,幫助企業完成從資產存放與控制、資金流轉與運營,到治理與合規管理的完整閉環。

其中,核心產品 Wallet-as-a-Service 和 Payment Engine 已廣泛應用於企業級數字資產運營場景。隨著數字資產基礎設施需求持續全球化,Cregis始終專注於一件事:幫助企業以更強控制力、更低運營複雜度和更完善的合規能力使用數字資產。

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