What is Stablecoin?
A crypto token designed to hold a fixed value, usually pegged 1:1 to a currency like the US dollar.
A stablecoin is a crypto token engineered to hold a fixed value — almost always one US dollar — so that people can move and park money on blockchains without the volatility of everything else. They're the plumbing of the market: the default trading pair on exchanges, the resting place between positions, and the rails for cross-border transfers.
The peg is only as strong as what backs it. Fiat-backed coins (USDT, USDC) hold real-world reserves and dominate; crypto-backed coins (DAI) lock a surplus of other crypto in smart contracts; and the algorithmic kind — backed by mechanism rather than assets — produced crypto's most spectacular collapse when Terra's UST went to zero in 2022. Our full explainer covers each model, and the USDT vs USDC head-to-head compares the two giants.
Two Australian notes: USD stablecoins carry AUD/USD currency risk that AUD-pegged alternatives don't, and swapping crypto into a stablecoin is a CGT disposal — not a tax pause button.
See it in practice
Related terms: Capital gains tax (CGT) · DeFi · Market cap · full glossary
FAQ
Are stablecoins safe?
Safer than volatile crypto in price terms, but they are not bank deposits: no government guarantee stands behind them, and their safety rests entirely on the quality and liquidity of the reserves backing the peg.
Why would an Australian hold a US-dollar stablecoin?
Mostly for trading pairs and DeFi access. But the value moves with the AUD/USD exchange rate, so "stable" means stable in US dollars — an Australian holder is carrying quiet currency exposure.
General information only, not financial advice. Definitions are maintained in our fact database and reviewed with the daily rebuild.