By XMRWallet Team · Published · 6 min read
The May 2022 collapse of TerraUSD (UST) brought stablecoins into sharp focus — demonstrating that not all assets claiming price stability actually deliver it. Stablecoins now play an important role in the crypto ecosystem, but understanding their differences in design, risk profile, and regulatory status is essential before using or holding them.
What Is a Stablecoin?
A stablecoin is a cryptocurrency designed to maintain a stable value relative to a reference asset — most commonly the US dollar, though some are pegged to other currencies, commodities like gold, or baskets of assets. Unlike Bitcoin or Monero, whose market prices fluctuate based on supply and demand, stablecoins are engineered to hold a consistent value.
Stablecoins serve several practical purposes: facilitating crypto-to-crypto trading without conversion to fiat; cross-border money transfers with lower fees than traditional remittance channels; DeFi lending and staking; and as a store of value during periods of high crypto market volatility.
Types of Stablecoins
Fiat-Backed Stablecoins
The most widely used stablecoins are backed by reserves of real currency, US Treasury bills, or other highly liquid assets held by a central issuer. For every token in circulation, the issuer is supposed to hold an equivalent amount in reserve. Tether (USDT), the largest stablecoin by market capitalization, falls into this category. USD Coin (USDC), issued by Circle, is another prominent example with more transparent reserve attestations.
Fiat-backed stablecoins introduce centralization and counterparty risk: you trust the issuer to actually hold the reserves they claim, to remain solvent, and to honor redemptions. They are also subject to regulatory requirements — issuers can freeze or blacklist specific wallet addresses.
Crypto-Collateralized Stablecoins
These are backed by cryptocurrency collateral locked in smart contracts, typically at a ratio of 150% or more — the overcollateralization buffer absorbs the underlying crypto's price volatility. DAI, issued by the MakerDAO protocol, is the most prominent example. The system is more decentralized than fiat-backed stablecoins, as no central issuer controls reserves, but it introduces its own risks: smart contract vulnerabilities and extreme crypto market crashes can stress the collateral system.
Algorithmic Stablecoins — and the TerraUSD Lesson
Algorithmic stablecoins attempt to maintain their peg through automated mechanisms that expand or contract token supply — without holding reserves of the pegged asset. TerraUSD (UST) was the most prominent example. Its peg was maintained by an algorithm that minted or burned a companion token (LUNA) to stabilize UST's price.
Historical event: In May 2022, TerraUSD lost its peg in a death spiral — the algorithm attempted to restore the peg by minting more LUNA, but hyperinflation of the LUNA supply further destroyed confidence. Within days, tens of billions of dollars in market value were wiped out. UST and LUNA never recovered. This event is widely regarded as a demonstration that algorithmic peg mechanisms without asset backing are vulnerable to bank run dynamics.
US Treasury Secretary Janet Yellen specifically referenced the TerraUSD collapse in Senate testimony, stating it illustrated the need for a comprehensive stablecoin regulatory framework. As former Treasury Secretary Yellen noted, stablecoins that cannot maintain their peg under market stress represent a risk to financial stability.
Stablecoin Use Cases
- Exchange trading: Trading crypto pairs denominated in stablecoins avoids fiat conversion fees and allows staying in the crypto ecosystem between positions
- Cross-border remittances: Sending stablecoins internationally is faster and cheaper than traditional wire transfers for many corridors
- DeFi participation: Lending, borrowing, and earning yield in decentralized finance protocols often uses stablecoins as the base asset
- Volatility hedging: Converting volatile crypto assets to stablecoins during market downturns preserves value within the crypto ecosystem without requiring fiat withdrawal
Stablecoin Regulation in 2026
Regulatory scrutiny of stablecoins has increased significantly since 2022. The EU's MiCA regulation (fully in effect December 2024) introduced specific requirements for stablecoin issuers operating in EU jurisdictions — including reserve requirements, licensing, and limits on non-euro stablecoins used as means of payment within the EU. In the US, stablecoin legislation has been an active area of Congressional debate, though comprehensive federal stablecoin law had not yet passed as of early 2026.
It is important to note that stablecoins are not investment assets in the traditional sense — their value is designed to remain stable, so holding them provides no capital appreciation. Yield on stablecoins requires lending or staking them, which introduces its own risks. As with any crypto asset, do your own research before using stablecoins and understand the specific risks of each type.
Stablecoins and Monero
Monero and stablecoins serve fundamentally different purposes. Monero provides cryptographic financial privacy for transactions and is a medium of exchange and store of value with market-determined pricing. Stablecoins provide price stability for denomination and settlement but are typically transparent on-chain, traceable, and subject to issuer censorship.
XMR can be exchanged for stablecoins through some smaller exchanges (verify current availability before registering), P2P platforms like Haveno DEX, or through atomic swaps to BTC and subsequent exchange. A diversified approach — keeping the bulk of privacy-sensitive holdings in XMR while maintaining stablecoin liquidity for active trading — is one way to combine the strengths of both.
Store your XMR in a non-custodial wallet where you hold the private keys. XMRWallet is free, open-source, browser-based, and requires no registration. Create your wallet, receive your 25-word seed phrase, write it down securely, and you have full control of your XMR immediately.
Frequently Asked Questions
What is a stablecoin and what types exist?
A stablecoin is a cryptocurrency designed to maintain a stable value relative to a reference asset (usually USD). Three main types: fiat-backed (USDT, USDC — backed by real currency reserves); crypto-collateralized (DAI — backed by overcollateralized crypto in smart contracts); and algorithmic (TerraUSD/UST — backed by a mint/burn mechanism, which failed catastrophically in May 2022).
Can I exchange Monero for stablecoins?
Yes, though major exchange options have narrowed after Binance (February 2024) and Kraken (2021) delisted XMR. Options: some smaller exchanges like TradeOgre list XMR/USDT; Haveno DEX supports P2P XMR trading; UnstoppableSwap converts XMR to BTC. Always verify availability directly on any exchange before registering, and withdraw to a non-custodial wallet immediately after any exchange interaction.
