Stablecoin
A stablecoin is a type of cryptocurrency that attempts to peg its market value to some external reference, usually a fiat currency like the US Dollar, to maintain price stability.
Stablecoins bridge the gap between traditional finance and decentralized blockchain ecosystems by providing price stability. They function as a medium of exchange, a store of value, and a unit of account without the extreme volatility of Bitcoin or Ethereum. While fiat-backed stablecoins are the most prevalent, decentralized alternatives like DAI and LUSD provide censorship-resistant stability. The performance of these assets is critical for secondary DeFi markets such as lending (Aave) and automated market makers (Uniswap).
graph LR
Center["Stablecoin"]:::main
Rel_rebase_token["rebase-token"]:::related -.-> Center
click Rel_rebase_token "/terms/rebase-token"
Rel_airdrop["airdrop"]:::related -.-> Center
click Rel_airdrop "/terms/airdrop"
Rel_algorithmic_stablecoin["algorithmic-stablecoin"]:::related -.-> Center
click Rel_algorithmic_stablecoin "/terms/algorithmic-stablecoin"
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🧠 Knowledge Check
🧒 Explain Like I'm 5
Imagine a digital dollar that lives on the internet. Unlike [Bitcoin](/en/terms/bitcoin), which goes up and down like a roller coaster, a stablecoin stays at $1.00 so you can use it to buy things easily.
🤓 Expert Deep Dive
Stablecoins are the bedrock of DeFi liquidity, mitigating the unit-of-account problem in volatile markets. Mechanically, they are categorized into four types: 1. Fiat-Collateralized (USDC, USDT): Centralized entities hold fiat reserves. Risks include censorship and reserve-matching transparency. 2. Crypto-Collateralized (DAI): Decentralized protocols use smart contracts to manage over-collateralized positions. Stability is maintained via liquidation auctions when collateral value drops below a threshold. 3. Algorithmic (FRAX, UST): Use market incentives (seigniorage) to expand/contract supply. The Terra collapse highlighted the 'death spiral' risk where the supporting asset loses value, breaking the peg. 4. Delta-Neutral (USDe): Use short positions on perps to hedge collateral value, creating a synthetic dollar with inherent yield. Regulatory oversight (MiCA, US Stablecoin bill) focuses on asset segregation and redemption rights.
❓ Frequently Asked Questions
Why would I use a stablecoin?
Stablecoins allow you to trade crypto and use dApps while avoiding price volatility, making them ideal for payments and lending.
Are stablecoins safe?
It depends on the backing. Centralized ones depend on company trust; decentralized ones depend on code and collateral quality.