A stablecoin is a cryptocurrency designed to maintain a stable value, almost always pegged 1:1 to the U.S. dollar. Unlike bitcoin or other volatile crypto assets, a stablecoin isn't meant to appreciate — it's meant to behave like digital cash: instantly transferable, usable across crypto exchanges and blockchain applications, and (in theory) always redeemable for one dollar.
How the major stablecoins actually work
The two largest stablecoins by market capitalization, USDT (Tether) and USDC (Circle), are reserve-backed: the issuer holds cash and cash-equivalent assets — largely short-term U.S. Treasuries — roughly equal to the number of tokens in circulation, and is meant to redeem tokens for dollars on demand. This model depends entirely on the quality, liquidity, and honesty of the reserve backing, which is why reserve composition and independent attestations of those reserves have become a central focus of stablecoin regulation and public scrutiny.
The regulatory framework finally caught up
The GENIUS Act, signed into law in 2025, established the first comprehensive federal framework for U.S. dollar-denominated stablecoins — requiring issuers to hold reserves in specific low-risk, liquid assets, undergo regular reserve audits, and comply with standardized disclosure requirements. This was a meaningful shift: stablecoins had operated for years in a comparatively unsettled regulatory environment, and a federal framework gives banks, payment companies, and institutional users a clearer basis for treating reserve-backed stablecoins as a legitimate payment rail rather than a purely speculative instrument.
What stablecoins are actually used for
- On/off ramps for crypto trading. Most crypto exchanges use stablecoins as the base pair for trading other digital assets, avoiding the need to convert to and from traditional currency for every transaction.
- Cross-border payments and remittances. Sending a stablecoin across a blockchain network can settle faster and cheaper than a traditional wire transfer, particularly for cross-border transfers that otherwise route through multiple correspondent banks.
- A stable store of value within crypto ecosystems. Holding stablecoins lets a crypto-native user or business avoid volatility exposure without fully exiting back into traditional banking.
Payment and rewards platforms are increasingly exploring stablecoin rails as a way to settle transactions faster and cheaper than traditional card networks. Foundry United's Switch is among the companies watching this space as it relates to rewards and payments infrastructure — an early-stage area worth tracking rather than a settled use case.
The honest risks
Reserve-backed stablecoins depend on trust in the issuer's reserves and its willingness to honor redemptions — a risk that's smaller under the new federal framework than it was previously, but not zero. Algorithmic stablecoins carry a fundamentally different and generally higher risk profile, as the Terra collapse demonstrated. And even reserve-backed stablecoins are not government-insured deposits the way a bank account is — holding one is not the same, risk-wise, as holding cash in an FDIC-insured account, regardless of how "stable" the name suggests.