Stablecoin
A stablecoin is a type of cryptocurrency designed to hold a steady value by pegging it to a reference asset — most often a fiat currency such as the US dollar or euro.
How the peg is maintained. Unlike cryptocurrencies whose price floats freely, a stablecoin aims to stay at or near a fixed value. There are three broad approaches. Fiat-collateralised (or reserve-backed) stablecoins hold reserves of cash and cash-equivalent assets equal to the coins in circulation, redeemable one-for-one; USDC and USDT are the largest examples. Crypto-collateralised stablecoins are backed by other digital assets held as over-collateralised reserves, absorbing the volatility of the backing through a buffer. Algorithmic stablecoins attempt to hold the peg through supply-and-demand mechanisms rather than reserves — an approach that has proved considerably more fragile, with several high-profile failures.
What they're used for. Stablecoins were created to solve a practical problem: moving value on blockchain networks without the volatility of assets like Bitcoin. They are widely used for payments and remittances, for settlement between parties, and as a bridge for moving between traditional currency and digital assets. Because they combine the price stability of fiat with the speed and programmability of blockchain settlement, they have become core to digital-asset finance, and increasingly to mainstream cross-border payments where speed and round-the-clock availability matter.
Regulation and reserves. As stablecoins have grown, regulators have focused on the quality and transparency of the reserves backing them. Frameworks such as the EU's Markets in Crypto-Assets (MiCA) regulation set requirements for issuers, and reserve attestations — independent confirmations that reserves match the coins in issue — have become a standard expectation for reserve-backed stablecoins. This scrutiny reflects the growing role stablecoins play in mainstream payments and settlement.
Why they matter. Stablecoins are one of the main points where traditional finance and digital assets meet. For businesses, they offer a way to hold and move dollar- or euro-denominated value on blockchain rails, settling quickly and around the clock. That makes them central to cross-border payments, treasury and the wider integration of digital assets into regulated financial services.