A crypto-collateralized stablecoin is backed by cryptocurrency deposits locked in smart contracts, overcollateralized to absorb price swings. DAI is the primary example: you deposit $150 worth of ETH to mint $100 of DAI. If your collateral drops in value, you get liquidated to protect the system. No single company controls the issuance.
What Is a Crypto-Collateralized Stablecoin?
3 min read
The short version
Instead of trusting a company to hold dollars in a bank, crypto-backed stablecoins use overcollateralized crypto locked in transparent smart contracts. Everyone can verify the backing on-chain in real time. The tradeoff: you need to put up more collateral than you get out (overcollateralization), and if your collateral drops too far in value, the system automatically sells it to protect the peg.
How It Works
MakerDAO (DAI) system: you open a "vault" (smart contract position) and deposit ETH, WBTC, or other approved collateral. You can mint DAI up to a maximum ratio (e.g., 150% collateralization minimum means $150 ETH for $100 DAI). If ETH's price drops and your ratio falls below 150%, keepers (automated bots) liquidate your position, selling your ETH at a discount to repay the DAI debt + penalty. The stability fee (interest on your DAI debt, set by governance) and the DAI Savings Rate (interest paid to DAI holders) are tools governance uses to expand/contract supply and maintain the peg. GHO (Aave), crvUSD (Curve), and LUSD (Liquity) follow similar overcollateralization models with different parameters and liquidation mechanisms.
Opening a MakerDAO vault and getting liquidated
You deposit 10 ETH ($30,000 at $3,000/ETH) into a MakerDAO vault. You mint 15,000 DAI (200% collateralization ratio, well above the 150% minimum). Your vault: 10 ETH collateral, 15,000 DAI debt. ETH drops 40% to $1,800. Your collateral is now worth $18,000. Ratio: $18,000 / $15,000 = 120%, below the 150% minimum. A keeper bot initiates liquidation. Your 10 ETH is auctioned off. The auction recovers the 15,000 DAI debt + 13% liquidation penalty (1,950 DAI). You receive whatever ETH remains after the debt and penalty are covered: roughly 0.6 ETH ($1,080). You kept the 15,000 DAI, but lost most of your ETH. Lesson: overcollateralize conservatively (250%+) if you want to survive major drawdowns.
What People Get Wrong
DAI is backed by dollars
DAI is backed by crypto deposits (ETH, WBTC, stablecoins as collateral) locked in smart contracts. No company holds dollars for DAI. It maintains its peg through overcollateralization, liquidation mechanisms, and governance-controlled interest rates.
You cannot lose money minting DAI
If your collateral drops and you get liquidated, you lose a significant portion of your deposit to the liquidation penalty. Opening a vault is borrowing against volatile collateral, which carries real risk during downturns.
Crypto-backed stablecoins are fully decentralized
MakerDAO governance has introduced real-world assets (US Treasuries) as collateral for DAI, making it a hybrid system. LUSD (Liquity) is more purely crypto-backed. The degree of decentralization varies by protocol.
Keep Reading
Sources & Further Reading
- MakerDAO Docs
Official documentation for the DAI stablecoin system
- DAI Stats
Live dashboard showing DAI collateralization ratios and system health
Questions People Also Ask
- Why would I mint DAI instead of just buying it?
- Minting lets you get dollar liquidity without selling your ETH. You maintain ETH upside exposure while accessing dollars. It is effectively a self-service loan: borrow dollars against your ETH, use the dollars, and repay later to get your ETH back.
- What is the DAI Savings Rate?
- An interest rate paid to anyone who deposits DAI into the DSR contract. As of 2024, it has been as high as 5-8% (funded by stability fees charged to vault owners and income from real-world asset collateral). It incentivizes holding DAI and helps maintain demand.
- Can DAI lose its peg?
- DAI has historically been very stable (rarely deviating more than 1-2% from $1) thanks to robust liquidation mechanisms and governance tools. However, in extreme market conditions (like a >50% crypto crash in hours), the system could theoretically become undercollateralized if liquidations cannot keep pace.