What Are Stablecoins? Understand How They Work

In 2025, stablecoins processed over $33 trillion USD in transaction volume. Names like USDT and USDC have become common across crypto exchanges, fintech apps, and cross-border payment platforms. Yet most explanations treat stablecoins like speculative digital assets rather than what they actually are: a new type of payment rail built on blockchain technology. This article closes that gap. You will learn what stablecoins are, how they maintain price stability, and how they function as settlement rails in production systems. By the end, you will be able to reason about stablecoins the way you reason about ACH or SWIFT: as payment rails with specific characteristics, tradeoffs, and appropriate use cases. What Are Stablecoins? A stablecoin is a digital currency designed to maintain a stable value relative to a reference asset, typically a fiat currency like the US dollar. Unlike Bitcoin or Ethereum, which can swing 10% or more in a single day due to price fluctuations, stablecoins aim to h