Bitcoin vs Tether

Key differences

Bitcoin and Tether occupy opposite ends of the crypto spectrum. Bitcoin is a decentralized cryptocurrency launched in 2009, designed as peer-to-peer electronic cash with a deliberately scarce supply — its price floats freely against fiat currencies. Tether (USDT) is a stablecoin: a token issued by a company and designed to track the value of the U.S. dollar, backed by reserves that the issuer converts into digital tokens.

Their infrastructure differs fundamentally. Bitcoin runs on its own blockchain secured by Proof of Work mining using the SHA-256 algorithm, with thousands of independent nodes and no central issuer. USDT does not have its own base blockchain; it is issued on many existing networks, including Ethereum, Tron, Solana, Avalanche, and TON, and its supply is controlled by Tether, a centralized company that mints and redeems tokens.

Supply mechanics are a clear contrast. Bitcoin is capped at 21 million coins, with about 20 million already mined and issuance halving roughly every four years. USDT has no fixed cap: its circulating supply — over 183 billion tokens — expands and contracts based on customer demand for dollar-pegged tokens.

In practice the two serve complementary roles. Bitcoin is held as a long-duration store of value and used for settlement, while USDT is the most widely used stablecoin, acting as a dollar substitute on exchanges, a quote currency for trading pairs, and a medium for moving dollar value between blockchains.