What Is a Stablecoin? (An Australian's Guide)
A stablecoin is a cryptocurrency designed to hold a steady value — almost always pegged to a currency like the US dollar, so one coin is worth about US$1. They exist to give you the speed and portability of crypto without the wild price swings of Bitcoin or Ethereum.
Why people use them
Stablecoins are the “cash” of the crypto world. Traders park funds in them between trades to sit out volatility; people use them to move value between exchanges quickly and cheaply; and in decentralised finance (DeFi) they’re the main unit of lending and borrowing. Because they don’t lurch up and down, they’re useful whenever you want crypto’s rails without the risk of the price halving overnight.
How they stay “stable”
Not all stablecoins work the same way, and the differences matter:
Fiat-backed (the main type). Coins like USDC (issued by Circle) and USDT (Tether) claim to hold one US dollar — or equivalent safe assets like short-term US Treasuries — in reserve for every coin issued. Their stability depends entirely on those reserves actually being there and redeemable. USDC is generally regarded as the more transparent of the two on reserves; USDT is the largest and most liquid.
Crypto-collateralised. Coins like DAI are backed by other crypto locked in smart contracts, over-collateralised to absorb price swings.
Algorithmic (high risk). These try to hold the peg using code and incentives rather than real reserves. This model has failed spectacularly before — the 2022 collapse of TerraUSD (UST) wiped out tens of billions of dollars when the peg broke. Treat algorithmic stablecoins with great caution.
What can go wrong
“Stable” doesn’t mean risk-free. A stablecoin can de-peg — briefly or permanently — if the market loses confidence in its backing, as USDC itself did for a weekend in 2023 during a US banking scare (it recovered). The core risks are reserve quality and transparency (are the dollars really there?), the issuer’s solvency, and regulatory action. Stick to the large, well-audited names, and don’t assume any stablecoin is as safe as money in a bank — none are covered by Australia’s deposit guarantee.
Stablecoins and Australian tax
Here’s the catch many Australians miss: to the ATO, a stablecoin is still a crypto asset, not currency. Swapping Bitcoin for USDT, or USDC back into another coin, is a CGT disposal just like any crypto-to-crypto trade — even though the value barely moves. Keep records of every stablecoin trade, and see our crypto tax guide for how disposals work.
The bottom line
Stablecoins are a genuinely useful tool for moving and holding value in crypto — just choose the transparent, fiat-backed majors, understand that the peg relies on real reserves, and remember the taxman still counts every swap. When you’re ready to buy or sell, compare Australian exchanges that support them.
General information only — not financial or tax advice.
General information only — not financial or tax advice. Verified 2026-07-31; details can change.