Stablecoins: What They Are and How They Work in the World of Cryptocurrency

Stablecoins, or stable cryptocurrencies, have become a bridge between traditional finance and digital assets. Pegged to fiat currencies, commodities, or algorithms, they offer stability in the highly volatile crypto market. Let’s explore how stablecoins work, what types exist, and why they are critically important for the DeFi ecosystem.

1. What Are Stablecoins and Why Are They Needed?

Stablecoins are digital assets whose price is tied to stable assets such as the US dollar, euro, gold, or a basket of currencies. Their main functions include:

• Reducing volatility. They help maintain value in cryptocurrency transactions.
• Simplifying trading. Used as a trading pair on exchanges (e.g., BTC/USDT).
• DeFi access. A collateral asset in lending protocols (Aave, Compound).

According to CoinMarketCap, the total stablecoin market capitalization exceeded $160 billion in 2024, with 70% belonging to Tether (USDT).

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2. Types of Stablecoins: Comparing Collateral Mechanisms

2.1. Fiat-Collateralized

• Examples: Tether (USDT), USD Coin (USDC), Binance USD (BUSD).
• Mechanism: Each token is backed by fiat reserves (dollars, euros) held in bank accounts.
• Risks: Dependence on audits and reserve transparency.

2.2. Crypto-Collateralized

• Examples: Dai (DAI), LUSD.
• Mechanism: Backed by overcollateralization with other crypto assets (ETH, BTC).
• Risks: Collateral volatility can lead to liquidations.

2.3. Algorithmic

• Examples: Ampleforth (AMPL), TerraUSD (UST)*.
• Mechanism: Supply and demand balance is regulated by algorithms without direct collateral.
• Risks: High probability of destabilization (as seen with UST in 2022).

*TerraUSD (UST) ceased to exist after its collapse in May 2022.

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3. Top 5 Stablecoins in 2024: Comparison

Name	Market Cap	Collateral	Launch Year
Tether (USDT)	$110 billion	Fiat, commercial paper	2014
USD Coin (USDC)	$30 billion	Fiat (audited)	2018
Dai (DAI)	$5 billion	Crypto (ETH, USDC)	2017
Binance USD (BUSD)	$2 billion	Fiat (regulated by NYDFS)	2019
TrueUSD (TUSD)	$1.5 billion	Fiat (daily audits)	2018

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4. How Are Stablecoins Used in DeFi?

Decentralized finance (DeFi) has become the main driver of stablecoin growth. Key use cases include:

• Lending. Using stablecoins as collateral to obtain loans (e.g., on Aave).
• Staking. Participating in liquidity pools to earn interest (Curve, Yearn).
• Arbitrage. Leveraging price differences between exchanges.

According to DeFi Pulse, over 60% of Total Value Locked (TVL) in DeFi comes from stablecoins.

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5. Regulatory Risks: What Threatens Stablecoins?

Stablecoins are under increasing regulatory scrutiny:

• USA. The STABLE Act proposes licensing for issuers.
• EU. The MiCA regulation bans algorithmic stablecoins without collateral.
• China. A total ban on stablecoins has been in effect since 2021.

SEC Chairman Gary Gensler: “Stablecoins are financial instruments that must comply with banking regulations.”

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6. The Future of Stablecoins: Predictions and Trends

1. CBDC Integration. Central banks will implement stablecoins on blockchain (e.g., digital euro).
2. Cross-Chain Compatibility. Stablecoins will operate across multiple networks without intermediaries.
3. Increased Transparency. Daily audits of reserves will become standard.

Circle CEO Jeremy Allaire: “By 2030, most global transactions will be conducted through stablecoins.”

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Conclusion

Stablecoins have become an essential part of the cryptocurrency ecosystem, providing stability and liquidity. However, their future depends on regulatory clarity and issuers' ability to maintain trust. Investors should choose projects with transparent audits and avoid algorithmic solutions without reliable backing.

As Dai creator Rune Christensen stated: “The ideal stablecoin is one that combines decentralization with resilience.” Achieving this balance will determine whether stablecoins become the foundation of global finance or remain a niche instrument.