What is Stablecoin?

A stablecoin is a token engineered to keep a stable price, most commonly pegged one-to-one with a fiat currency such as the US dollar. It gives crypto users a way to hold value, trade, and earn without riding the volatility of assets like Bitcoin. Stablecoins are backed in different ways, by reserves, by other crypto, or by algorithms.

This matters because stablecoins are the common unit for DeFi lending, DEX trading, and parking value between moves. Understanding how a stablecoin maintains its peg tells you how much to trust it.

Example: to step out of a volatile position without leaving crypto, you swap a token for a dollar-pegged stablecoin, keeping roughly steady value until you redeploy.

Safety note: not all stablecoins are equally safe. Reserve-backed ones depend on the issuer actually holding the assets, and some algorithmic designs have collapsed and lost their peg entirely. Do not assume any stablecoin is risk-free, and be very cautious of obscure or extremely high-yield stablecoins, which can hide serious risk. Related terms include market cap, DeFi, yield farming, and token vs coin.