Stablecoins Explained: The Quiet Workhorse of Crypto and DeFi

A stablecoin is a crypto token designed to stay worth about one unit of ordinary money, almost always one US dollar. It exists because moving between volatile coins and a bank account is slow and expensive, while moving between a volatile coin and a dollar-denominated token takes seconds. Most of the trading volume in crypto is denominated in stablecoins, which makes them the plumbing of exchanges and DeFi platforms alike.

There are three broad designs, and they carry completely different risks. Fiat-backed coins hold cash and short-term government debt in regulated accounts and issue one token per dollar held; their risk is whether the reserves are real, liquid, and legally yours. Crypto-collateralised coins lock up more crypto than they issue — say $150 of collateral for $100 of tokens — and rely on automatic liquidations when collateral falls; their risk is a fast crash outrunning those liquidations. Algorithmic coins hold little or no collateral and try to hold the peg by expanding and contracting supply; that design has failed spectacularly and repeatedly, most famously in 2022, and beginners should simply avoid it.

A depeg is what happens when the market stops believing. The token trades at ninety-five cents, then ninety, and holders rush to redeem or sell at once. Sometimes it recovers within days, as happened when a well-known coin briefly held reserves at a failing bank. Sometimes it never recovers. What determines the outcome is almost always the quality and accessibility of the reserves, not the cleverness of the mechanism.

So the questions to ask are practical. Who issues this coin, and in which country are they regulated? What exactly backs it, and how much of that is cash and short-dated treasuries rather than commercial paper or loans to affiliates? Who audits or attests to those reserves, how often, and is it a full audit or a lighter-touch attestation? Can ordinary holders redeem directly, or only large institutional partners? Can the issuer freeze balances, and under what process? Every serious issuer publishes answers; treat silence as an answer in itself.

Stablecoins are genuinely useful. They let you sit out volatility without leaving the market, send value across borders in minutes for cents, and settle payments at weekends when banks are closed. Increasingly they are also regulated as payment instruments, which has pushed the largest issuers towards conservative reserves and regular reporting.

But there are two habits worth adopting. First, do not treat a stablecoin yield as a savings-account rate: that yield comes from lending your tokens to someone, and the interest is compensation for the chance they cannot pay you back. Second, do not concentrate. If a large share of your money lives in one issuer's token, you have taken a credit position in a single company, however dull that company looks.

Stable does not mean risk-free. It means the price is designed to sit still while the risk moves somewhere less visible.