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A stablecoin is a cryptocurrency designed to hold a steady value, almost always pegged to one US dollar, so that one unit is meant to always be worth one dollar regardless of what the rest of the crypto market is doing.
As of 2026, stablecoins represent a market worth hundreds of billions of dollars and, by some measures, already move more annual volume than major card networks. They are used as a bridge between volatile crypto and stable money, as collateral and liquidity in decentralized finance, and increasingly as a payment rail for moving large volumes of value across borders.
Most cryptocurrencies are volatile, swinging in value by large percentages in short periods, which makes them impractical for everyday uses such as pricing goods or holding savings. Stablecoins address this by offering the benefits of cryptocurrency—fast, borderless, programmable digital money—while anchoring value to a stable asset, almost always the dollar.
Stablecoins are used in several ways: for traders, they provide a place to wait when exiting volatile positions without converting back to traditional banking; for decentralized finance, they function as a unit of account and key collateral; and for payments and transfers, they enable faster, lower-cost movement of dollar value across borders.
Stablecoins differ in how they maintain their dollar peg, which is also the central factor in assessing risk. There are three fundamentally different mechanisms.
Fiat-backed stablecoins hold real-world reserves. The basic model is that for every stablecoin in circulation, the issuer holds one dollar (or a dollar’s worth of safe assets such as cash and short-term government bonds). Redeemability—an ability to exchange the stablecoin for an actual dollar—helps keep the price anchored near one dollar.
USDT and USDC are dominant examples. In this model, the issuer holds reserves and redeems tokens on demand. The main tradeoff is centralization: users must trust the issuer to hold reserves and honor redemptions, making reserve transparency important.
Crypto-collateralized stablecoins back their value with other cryptocurrencies rather than dollars. Because crypto is volatile, they use overcollateralization: to mint a dollar’s worth of stablecoin, users must lock up more than a dollar’s worth of collateral, often around a hundred and fifty dollars of an asset like Ether for a hundred dollars of stablecoin.
The extra cushion is intended to absorb price swings. If the collateral value falls too far, the system automatically sells some collateral to maintain backing. DAI is cited as the classic example. The tradeoff is capital inefficiency and exposure to collateral volatility during market crashes.
Algorithmic stablecoins attempt to maintain the peg through code rather than reserves. They use algorithms that expand or contract token supply to push the price toward one dollar. This category is described as the riskiest and least proven.
The article points to the 2022 collapse of TerraUSD, an algorithmic stablecoin that lost its peg and destroyed tens of billions of dollars in value in days. The failure is attributed to the algorithmic mechanism unraveling under stress.
With these mechanisms in mind, the article highlights several major stablecoins and how they differ.
USDT is described as the largest stablecoin by far, with a market value well over a hundred billion dollars. It is fiat-backed, with reserves including cash, government bonds, and other assets, and it publishes periodic attestations. The article notes that USDT’s strength is liquidity and ubiquity, while its reserve transparency has been widely debated.
USDC is described as the second largest stablecoin and also fiat-backed. It is characterized as more transparency-focused and regulation-friendly, backed by cash and short-term US government bonds with regular reserve reporting from major accounting firms. The article says USDC is often preferred by institutions in the United States.
RLUSD is described as a newer entrant that has grown into a significant stablecoin, reaching well over a billion dollars in value. It is described as dollar-backed with a focus on regulatory compliance and institutional and payment use, operating across many networks and integrated into payment infrastructure, including a notable integration with a major card network’s settlement system.
For fiat-backed stablecoins, the peg depends on redeemability and arbitrage. If the stablecoin trades below one dollar, traders can buy it cheaply and redeem it for a full dollar, profiting from the difference and pushing the price back toward the peg. If it trades above one dollar, new tokens can be minted and sold (or traders can redeem in the opposite direction), increasing supply and pushing the price back down.
The article emphasizes that this mechanism works only if the promise of redeemability is credible. If confidence weakens—such as doubts about reserves or fear that redemptions cannot be honored—the arbitrage incentive can fail, and the peg can break. The same theme is applied to other models: crypto-collateralized stablecoins rely on overcollateralization and liquidation, while algorithmic stablecoins rely heavily on market confidence because they have no hard asset backing.
Stablecoins can lose their dollar value, a situation called a depeg. Depegs can range from brief, minor price wobbles to permanent collapses.
The article cites the 2022 failure of TerraUSD, an algorithmic stablecoin that lost its peg and spiraled to near zero, destroying tens of billions of dollars in days. It also notes that even backed stablecoins can depeg temporarily; in 2023, one major fiat-backed stablecoin briefly lost its peg after some cash reserves were caught in a collapsing bank, with the price later recovering when funds were confirmed safe.
The article lists key risk categories: reserve risk (reserves may be poor quality, not as claimed, or inaccessible), counterparty and centralization risk (issuers may fail, freeze redemptions, or act against holders), smart-contract risk (for crypto-collateralized stablecoins), algorithmic risk (for algorithmic models), and regulatory risk (changes in rules affecting operation or availability).
As stablecoins have grown in size and importance, governments have begun regulating them more seriously. The article describes regulators building frameworks to address the potential harm from stablecoin failures and to reduce risks to broader financial stability.
In the United States, legislation is described as moving toward rules for stablecoin issuers, including requirements around reserves, redemption, and oversight. In Europe, the article describes a comprehensive framework as part of broader crypto regulation, emphasizing high-quality reserves, honoring redemptions, disclosing backing, and operating under supervision.
The article says regulation can affect users by favoring transparent, well-backed stablecoins and pressuring or excluding opaque or riskier ones over time. It also notes a tradeoff: more oversight and compliance requirements, including identity-related and controlled access elements.
The article offers practical principles for using stablecoins with an emphasis on risk awareness.
The article also notes that yield-bearing stablecoins exist, but any yield carries additional risks that should be understood. It reiterates that standard crypto security practices apply, since stablecoins are still crypto assets that can be stolen if wallet security fails.
The article’s central message is that a stablecoin’s stability depends on what backs it. Fiat-backed stablecoins with transparent, high-quality reserves are described as the most reliable; crypto-collateralized stablecoins add smart-contract and collateral risk; and algorithmic stablecoins carry the gravest danger, highlighted by the 2022 TerraUSD collapse. The peg is maintained through redeemability and arbitrage when confidence in backing holds, and it can break when that confidence fails. Regulation is described as reshaping the sector toward transparency and stronger reserve practices.
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