What is USDT? How to buy and trade USDT? 2025 Beginner's Complete Guide

Definition and Core Features of USDT

USDT (Tether) is the most widely used stablecoin globally, issued by Tether Limited, pegged to the US dollar at a 1:1 ratio, aimed at providing price stability in the cryptocurrency market. Its core features include:
1. Basic Attributes
Anchoring Mechanism: Each USDT is backed by 1 US dollar (or equivalent assets) held in reserve by Tether, with reserve audit reports available on the official website.

Circulation: As of 2025, the total circulation of USDT has surpassed 20 billion, accounting for over 65% of the stablecoin market share.

Blockchain Type: Supports multi-chain protocols such as ERC-20 (Ethereum) and TRC-20 (Tron), with transfer fees and speeds varying by chain.
1. Application Scenarios
Trading Hedging: Exchanging USDT to preserve value during volatility in the cryptocurrency market.

Cross-Border Transfers: Bypassing traditional banking systems for low-cost international remittances.

DeFi Participation: Serving as a foundational asset for decentralized finance (such as lending and liquidity mining).

Comparison of USDT with Other Stablecoins

Stablecoin	Issuer	Audit Transparency	Main Use Cases
USDT	Tether	Monthly reserve reports	Exchange trading, cross-border transfers
USDC	Circle	Real-time on-chain reserve verification	DeFi protocols, corporate payments
DAI	MakerDAO	Over-collateralized asset guarantee	Decentralized finance applications

How to Buy and Trade USDT (2025 Latest Guide)

Step 1: Register and Download the OKX App

Visit the official website: Enter https://ouyijoin.com (real-time synchronization with global nodes) using Chrome/Safari browser.

Register an Account:

Copy the registration link to open in the browser, register through the official link provided, download the OKX APP, and follow the instructions to complete registration. After successful registration, you will enjoy high-quality trading services and rich user benefits provided by OKX.

Download the Client:

After registration is complete, click the top right corner to find the download page. Android users can directly download and install the APK, then log in with the registered account to start using. Apple users need to complete registration, then use an overseas ID to download the app from the Apple Store and log in with the registered account (overseas IDs are available for purchase on Taobao). Only those who register through the web link can enjoy fee discounts and receive a blind box gift in the APP! The blind box may contain fee discounts or direct cryptocurrency gifts, with a maximum value of 60,000 yuan in digital currency.

Step 2: Fiat Currency Exchange for USDT

Quick Purchase:

Log into the App → Enter the "Quick Buy" page → Choose Alipay/Bank Card payment.

USDT funds will be automatically credited to your account at the real-time exchange rate.

C2C Trading:

In the "Fiat Trading Zone," select quality merchants, compare quotes, and place orders to purchase.

Step 3: Trade USDT for Other Cryptocurrencies

Spot Trading:

Search for trading pairs like BTC/USDT, ETH/USDT → Enter the purchase amount → Use "Limit Order" to control costs.

Contract Trading (High Risk):

Choose USDT-denominated contracts, set leverage from 1-125 times, and enable "Take Profit and Stop Loss" to reduce risk.

Step 4: USDT Withdrawal and Storage

Withdraw to Wallet:

Generate a compatible on-chain address (such as ERC-20 or TRC-20) → Pay miner fees to complete the transfer.

Wealth Management:

Deposit into OKX "Remaining Coin Treasure" to enjoy an annualized yield of 3%-8%.
Precautions for USDT Trading
1. Safety Risk Prevention
Chain Selection: Prefer using the TRC-20 chain (with fees as low as 1 USDT), and for large transfers, consider the ERC-20 chain (higher security).

Address Verification: Always verify the first and last characters of the address before withdrawal to avoid asset loss due to incorrect chain transfers.
Frequently Asked Questions (2025 Latest Version)

Q1: Will USDT lose its peg?

→ Tether regularly publishes reserve reports (including cash, government bonds, etc.), with historical volatility below 0.5%, but market extremes should still be monitored.

Q2: Are USDT on different chains interchangeable?

→ They are not interchangeable. ERC-20 and TRC-20 USDT are different assets on different chains, and transfers must ensure the recipient supports the same protocol.

Q3: How to exchange USDT for RMB?

→ Sell USDT for Alipay/Bank Card in the OKX "Fiat Trading Zone."

Conclusion

By downloading the OKX App from https://ouyijoin.com, you can conveniently complete USDT purchases, trading, and asset management. Whether avoiding market volatility or participating in the DeFi ecosystem, USDT is a core tool for cryptocurrency investment.

Take Action Now: Click to Enter the OKX Official Website