A stablecoin is a type of cryptocurrency designed to keep a stable price, usually by being tied (“pegged”) to another asset such as:

• The US dollar
• Gold
• Other currencies
• Sometimes other cryptocurrencies

For example, a USD stablecoin aims to stay close to:

Why stablecoins exist

Most cryptocurrencies like Bitcoin or Ethereum can fluctuate heavily in price.

Stablecoins try to combine:

• The speed and programmability of crypto
• With the price stability of traditional money

Common stablecoins

Tether (USDT)

One of the most widely used stablecoins.

USD Coin (USDC)

A dollar-backed stablecoin issued by regulated financial partners.

DAI

A decentralized stablecoin backed mainly by crypto collateral.

Main types of stablecoins

1. Fiat-backed stablecoins

Backed by reserves like dollars held in banks.

Example:

• 1 USDC token is intended to be backed by about 1 USD in reserves.

Pros:

• Usually more stable
• Easier to understand

Cons:

• Requires trust in the issuing company

2. Crypto-backed stablecoins

Backed by other cryptocurrencies locked in smart contracts.

Example:

• DAI

Pros:

• More decentralized

Cons:

• More complex
• Can become unstable during market crashes

3. Algorithmic stablecoins

Use software rules and token supply adjustments to maintain price stability.

Pros:

• No traditional reserves needed

Cons:

• Higher risk
• Some have collapsed dramatically

A famous example was the collapse of TerraUSD in 2022.

Common uses

Trading

Crypto traders use stablecoins to move money quickly between exchanges without converting back to bank currency.

Payments

Fast international transfers with lower fees.

DeFi

Used in decentralized lending, borrowing, and yield platforms.

Savings

Some platforms offer interest on stablecoin deposits.

Risks

Stablecoins are not risk-free.

Possible risks include:

• Reserve mismanagement
• Loss of the peg
• Smart contract bugs
• Regulation changes
• Bank failures
• Liquidity problems

Even “stable” coins can temporarily trade below their target value.