Cryptocurrencies such as Bitcoin are known for wild price swings, which makes them awkward to use as money. A coin that can lose a tenth of its value in a day is a poor way to pay rent. Stablecoins were created to fix that. They are digital tokens designed to hold a steady value, usually one U.S. dollar each.
How They Hold Their Value
Most stablecoins are backed by reserves. For every token in circulation, the issuing company holds a dollar’s worth of safe assets, such as cash and short-term U.S. Treasury bills. Holders can, in principle, redeem a token for a dollar at any time, and that promise keeps the market price close to $1. The two largest stablecoins, Tether and USD Coin, work this way. Other designs exist. Some are backed by other cryptocurrencies, holding more collateral than the value of the coins issued. Algorithmic stablecoins try to hold their price with software that expands and shrinks the supply, with little or no real backing.
What They Are Used For
Stablecoins began as a convenience for crypto traders, who needed a way to move in and out of volatile coins without converting to regular bank money each time. They remain the main currency of crypto exchanges. Their use has spread beyond trading. Stablecoins can be sent across borders at any hour, often faster and more cheaply than a bank transfer. In countries with high inflation or unstable currencies, some people use them as a way to hold dollars.
The Risks
A stablecoin is only as stable as what stands behind it. If holders doubt that the reserves exist or can be sold quickly, they may rush to redeem at once, much like a run on a bank. Questions about the quality and transparency of reserves have followed some issuers for years. The danger is greatest for coins without solid backing. In May 2022, the algorithmic stablecoin TerraUSD lost its link to the dollar and collapsed within days, wiping out tens of billions of dollars and setting off failures across the crypto industry.
Regulation
Because stablecoins behave like bank deposits without bank rules, regulators have moved to bring them under supervision. The European Union adopted rules for issuers as part of its broader crypto law. In 2025, the United States passed its first federal framework, the GENIUS Act, which requires issuers of payment stablecoins to hold high-quality liquid reserves and disclose them regularly. Supporters say clear rules will make stablecoins safer and encourage wider use. Skeptics worry about money flowing out of traditional banks and about illicit finance.
Conclusion
Stablecoins combine the speed of cryptocurrency with the familiar value of the dollar. They have grown from a niche trading tool into a significant part of the financial system. Their promise depends entirely on trust in the reserves behind them. As with any form of private money, the key question is not what the coin is worth today but whether it can be redeemed tomorrow.