What Is a Stablecoin?
A crypto token designed not to move much. Here is why that is useful, and where it can quietly go wrong.
Quick answer
A stablecoin is a cryptocurrency built to hold a steady value, almost always pegged to a real-world currency like the US dollar. One “stablecoin” is designed to always be worth about one dollar, regardless of what the wider crypto market is doing.
Why anyone would want a coin that doesn’t move
Most cryptocurrencies exist partly because their price can rise. Stablecoins exist for the opposite reason: to be useful despite not rising. They let people move value between exchanges, hold cash-like balances inside crypto apps, and trade in and out of other coins without constantly converting back to a traditional bank account — all while (ideally) not losing value to the volatility everything else in crypto is known for.
How the “stability” actually works
There isn’t one single method — a few different approaches exist, and the difference matters:
- Fiat-backed. The issuer holds real dollars (or dollar-equivalent assets like short-term government bonds) in reserve, roughly one dollar in reserve for every token issued. The largest stablecoins work this way.
- Crypto-backed. Backed by other cryptocurrencies held in reserve, usually over-collateralised (more value locked up than tokens issued) to absorb price swings in the collateral itself.
- Algorithmic. Attempts to hold the peg through code and market incentives rather than real reserves. This approach has failed dramatically and publicly before — several algorithmic stablecoins have lost their peg entirely and collapsed.
A simple way to picture it
A fiat-backed stablecoin is like a casino chip: the casino holds real cash in a vault for every chip in circulation, so you trust you can cash out at face value. An algorithmic stablecoin is more like an IOU that promises to always be worth a dollar because the system says so — with no vault behind it. When trust in that promise breaks, so does the price.
Why it matters
“Stable” is a design goal, not a guarantee. A stablecoin is only as trustworthy as what actually backs it and who controls that reserve. Before treating any stablecoin like cash, it’s worth knowing which category it falls into — and that even fiat-backed ones carry some counterparty risk, since you are trusting the issuer’s reserves are real and accessible.
Related terms
Peg
The target value a stablecoin is designed to maintain, typically $1 for dollar-pegged coins.
Collateral
Assets locked up to back a loan or a crypto-backed stablecoin, reducing risk for whoever is relying on…
Tether (USDT)
Delia Frankowski
Guides and first steps
Writes the step-by-step guides: your first wallet, your first buy, what the fees are actually for, and how to check you have done it right.
A standing byline of the Bright Start News desk, not an individual journalist. Everything published under it is written and edited by the desk, which is accountable for it.
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