Stablecoins: the plumbing everything else in crypto rests on
Most crypto trading is denominated in stablecoins rather than dollars. What backs them, and how quickly that backing can be verified, is a systemic question dressed as a technical one.
Key takeaways
- – Stablecoins are the settlement layer for most crypto trading volume
- – Backing quality varies enormously, from short-dated government debt to opaque mixtures
- – Algorithmic designs without external collateral have repeatedly failed under stress
A stablecoin is a token designed to hold a fixed value against a currency, almost always the US dollar. They exist because moving actual dollars between exchanges is slow and requires banks, while moving a token is fast and does not. As a result the majority of crypto trading is quoted against stablecoins rather than against fiat, which makes them the plumbing of the entire market.
Three designs, three risk profiles
- Fiat-backed. The issuer holds reserves – cash and short-dated government debt – and redeems tokens on demand. The risk is credit and custody risk on the issuer, plus the question of whether the reserves are what they are claimed to be.
- Crypto-collateralised. Backed by volatile crypto assets held in excess of the token value, with automated liquidation if collateral falls. The risk is that liquidation mechanisms fail in a fast market, which is exactly when they are needed.
- Algorithmic. Maintains the peg through supply adjustment and incentives rather than external collateral. This design has failed repeatedly and catastrophically under stress, because the mechanism relies on confidence that evaporates precisely when the peg is tested.
Why the backing question is not academic
If a widely used stablecoin loses its peg, the effect is not confined to holders of that token. It is the unit of account for a large share of trading pairs, collateral in lending protocols, and the settlement asset between venues. A break propagates through all of it simultaneously. The historical episodes have produced forced liquidations, protocol insolvencies and exchange failures well beyond the issuer.
What to look at
Attestations are not audits, and the distinction matters: an attestation confirms a balance at a point in time, an audit examines controls and completeness. Look for the composition of reserves rather than only the total, for the frequency of reporting, and for what redemption actually requires in practice – who can redeem, in what size, and how quickly.
Practical handling
Treat a stablecoin balance as a credit exposure to its issuer rather than as cash, because that is what it is. Spreading balances across issuers reduces single-issuer risk, and holding trading balances no larger than necessary reduces all of it. The convenience is real; so is the counterparty.
