// GLOSSARY -- BLOCKCHAIN & CRYPTO FUNDAMENTALS

What is USDT (Tether)?

1 min read Updated

USDT (Tether) is the largest stablecoin by market capitalization, pegged to the US dollar and issued by Tether Limited — widely used as the primary trading pair and settlement currency across cryptocurrency markets.

WHY IT MATTERS

USDT is the most widely used stablecoin, with a market cap exceeding $80 billion. It's the default quote currency on most centralized exchanges, the most liquid trading pair, and the dominant stablecoin on Tron (widely used for cross-border transfers).

Tether maintains the $1 peg through reserve backing — a mix of US Treasury bills, commercial paper, and other assets. The exact composition of reserves has been a persistent point of controversy, with Tether historically providing limited transparency.

Despite concerns about reserve transparency, USDT has maintained its peg through multiple market crises. Its network effects and liquidity advantages keep it dominant, though regulatory pressure and competition from USDC are ongoing factors.

FREQUENTLY ASKED QUESTIONS

Is USDT safe?
USDT has maintained its peg consistently, but reserve transparency is lower than competitors like USDC. The risk is non-zero — use appropriate position sizing and consider diversifying across stablecoins.
USDT vs USDC?
USDT has larger market cap and more liquidity. USDC has better transparency and regulatory compliance. For institutional use, USDC is generally preferred. For trading liquidity, USDT dominates.
What chains is USDT on?
Ethereum, Tron (largest by volume), Solana, Avalanche, Polygon, and many others. The Tron version is popular for low-cost peer-to-peer transfers.

FURTHER READING

Enforce policies on every tool call

Intercept is the open-source MCP proxy that enforces YAML policies on AI agent tool calls. No code changes needed.

npx -y @policylayer/intercept
github.com/policylayer/intercept →
// GET IN TOUCH

Have a question or want to learn more? Send us a message.

Message sent.

We'll get back to you soon.