What is crypto-backed stablecoin?

A stablecoin issued against crypto collateral locked in a contract, always worth more than the debt it supports.

Because the collateral moves in price, the system holds a buffer and liquidates positions that fall below a minimum ratio set per collateral type in the protocol's own published parameters. That makes it transparent, since anyone can read the collateral on chain, and reflexive, since the same price fall that threatens the peg also triggers the liquidations meant to defend it.

Capital efficiency is the trade-off: locking well over a dollar of volatile collateral to mint a dollar of stable value. Governance sets the collateral list and the ratios, so the risk profile of the token can change by vote rather than only by market event.

How it works

A borrower locks collateral in a contract and mints stablecoins against it, up to a limit set by the collateral type's required collateralization ratio. The stablecoin is debt, and repaying it releases the collateral.

The peg is maintained by arbitrage in both directions. When the stablecoin trades below a dollar, borrowers can repay debt at a discount, which retires supply. When it trades above, minting and selling is profitable, which adds supply. Some designs add an interest rate on the debt as a further lever.

Liquidation is the backstop. A position falling below its minimum ratio is closed by a liquidator who repays part of the debt, takes collateral, and keeps a penalty paid out of the position. Systems typically also hold a surplus buffer to absorb liquidations that clear at a loss.

The reflexivity is the structural weakness. A sharp fall in collateral price triggers liquidations, liquidations sell collateral, and selling pushes the price down further. Congestion during exactly those moments can prevent liquidators acting, which is how a system ends up with debt backed by collateral worth less than the debt.

Three stablecoin models, for comparison:

Illustrative categories; several designs blend them.

Example

Illustrative. You lock 15,000 dollars of ETH at a 150 percent minimum ratio and mint 10,000 stablecoins. Your ratio is 150 percent and you are at the liquidation edge immediately. Locking the same 15,000 dollars and minting 5,000 gives a 300 percent ratio, meaning ETH can fall by half before liquidation. If it does fall by half in the first case, a liquidator repays your debt, takes collateral, and charges a penalty, so you keep the 10,000 stablecoins and lose more collateral than the debt was worth.

Why it matters when you buy

If you hold a stablecoin rather than just passing through one, its backing model determines what can go wrong with it. Crypto-backed designs let you verify the collateral yourself, which fiat-backed designs cannot offer, and expose you to cascade risk that fiat-backed designs do not have. Stablecoins explained compares the models, and the coin pages cover individual assets.

Related terms

over collateralization — why more is locked than minted; liquidation — the mechanism defending the peg; collateralization ratio — the number that triggers it; stablecoin — the wider category; depeg — what happens when the mechanism fails.

Questions

Is it safer than a fiat-backed stablecoin?

It is differently risky. You can verify the collateral on chain, which you cannot with a bank balance, and you take on liquidation cascade risk and governance risk that a fiat-backed coin does not carry.

What is governance risk here?

Token holders vote on which assets count as collateral and at what ratios. A vote admitting a weaker collateral type changes the risk of the stablecoin you hold, without any market event and without your involvement.

Can I lose money just by holding one?

Holding the stablecoin exposes you to the peg and to the system's solvency, not to liquidation, which affects borrowers. Several designs have traded away from their peg during stress, some briefly and some permanently.