What Is USDT? The Most Complete Guide for 2025 – From Principles and Risks to Practical Applications

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USDT Now Accounts for 68% of Global Stablecoin Trading Volume

In the cryptocurrency market, USDT has become a nearly ubiquitous stablecoin. According to the latest statistics, USDT's circulating supply still dominates 68% of global stablecoin trading volume in 2024! Many people wonder: "What is USDT? How does it maintain a 1:1 peg with the U.S. dollar? Is USDT safe? And how can I acquire it?"

This guide will answer all your questions—covering Tether’s history, the mechanism behind USDT’s dollar peg, purchasing methods, risk assessments, and the latest regulatory updates. You’ll gain a comprehensive understanding of this crypto star.

More importantly, we’ll reveal Tether’s three undisclosed operational mechanisms and provide an in-depth analysis of ongoing regulatory controversies. Ready to explore USDT? Let’s begin!

The Birth and Core Functions of USDT

USDT’s Original Purpose: A 1:1 Dollar Peg

USDT (Tether) was first launched in 2014 by Tether Limited, aiming to provide a stablecoin "pegged 1:1 to the U.S. dollar" for the crypto market. Its core principles:

The Stablecoin Favored by Global Exchanges

As a stablecoin, USDT is widely accepted:

Technical Deep Dive: Omni vs. ERC-20 vs. TRC-20 Protocols

1. Omni Protocol

The original USDT ran on Bitcoin’s Omni Layer—secure but slow, with fees fluctuating with BTC network congestion.

2. ERC-20 (Ethereum)

ERC-20 USDT offers:

3. TRC-20 (TRON Network)

TRC-20 USDT on TRON features:

Conclusion: Choose based on use case. ERC-20 suits DeFi; TRC-20 excels for exchange transfers.

How to Buy/Exchange USDT? (With Fee Comparison Table)

1. Where to Buy USDT?

  1. Centralized Exchanges (CEX)

    • Binance, OKX, KuCoin.
    • Steps: Sign up → KYC → Deposit fiat → Buy USDT.
  2. P2P/OTC Platforms

    • Peer-to-peer trading where regulations restrict CEX access.
  3. DEXs (Decentralized Exchanges)

    • Uniswap, Sunswap (TRON)—swap other tokens for USDT.

2. Exchange Fee Comparison

| Exchange | Deposit Method | Trading Fee | Withdrawal Fee | Supported Chains |
|-----------|----------------------|-------------|-----------------|-------------------------|
| Binance | Credit Card/P2P | 0.1% | 1 USDT (TRC-20) | ERC-20, TRC-20 |
| OKX | Credit Card/P2P | 0.08–0.1% | 0.8 USDT (TRC-20)| ERC-20, TRC-20 |
| KuCoin | Credit Card/P2P | 0.1% | 1 USDT (TRC-20) | ERC-20, TRC-20 |
| Coinbase* | Bank Transfer | 0.5–2% | ~$5–10 | ERC-20 |

*Coinbase supports USDT only in select regions.

Regulatory Controversies and Security Concerns (2024 Updates)

Tether’s Reserve Disputes

Despite audits, U.S./EU regulators demand more transparency. Key 2024 developments:

Three Major Incidents

  1. 2018: Alleged fund misuse between Bitfinex and Tether.
  2. 2020: Brief depeg to $0.95, sparking "quiet crash" fears.
  3. 2022: Banking partners cut ties, complicating withdrawals.
Warning: While USDT survived these, they highlight reserve and regulatory risks.

Global USDT Regulations

Critical Mistakes: Wallet Risks 90% of Users Miss

1. Wrong Protocol = Lost Funds

2. Hot Wallet Vulnerabilities

3. Private Key Leaks

FAQs: Top USDT Questions

1. Is USDT Safe?

High liquidity but contested reserves. Diversify holdings.

2. Fastest Way to Buy USDT?

CEXs (Binance/OKX) or P2P, depending on local laws.

3. USDT vs. USDC/BUSD?

USDC/BUSD are more transparent; USDT leads in market share.

4. Could USDT Go to Zero?

No evidence yet, but regulatory risks persist.

5. How to Buy USDT on Binance?

👉 Maximize your USDT holdings with secure storage tips

Conclusion: USDT’s Present and Future

"What is USDT?" In short, it’s crypto’s "dollar substitute," pivotal for trading, DeFi, and payments. Despite controversies—reserve doubts, regulatory scrutiny—USDT remains the stablecoin leader.

Post-2024, stricter global regulations and rivals (USDC, BUSD, DAI) challenge Tether’s dominance. Investors must weigh USDT’s pros/cons to navigate crypto’s evolving landscape.

👉 Discover advanced USDT strategies for 2025