In the world of cryptocurrencies, stablecoins are often seen as a bridge between fiat currency and digital assets. Unlike coins whose prices fluctuate sharply, stablecoins are designed to maintain a relatively stable value against a reference asset, most commonly the US dollar. Thanks to this characteristic, users can use stablecoins to trade, transfer assets between platforms, or temporarily avoid volatility without necessarily withdrawing funds into the banking system.
However, the word “stable” in stablecoin does not amount to an absolute guarantee. Each stablecoin relies on a different backing mechanism and comes with different risks. A coin backed by cash or liquid assets may face reserve and issuer risks. A coin that uses collateral on the blockchain, meanwhile, depends on the value of the collateral, smart contracts, and the ability to liquidate assets. By contrast, a model that relies heavily on algorithms and market incentives can become fragile when confidence declines.
How Do Stablecoins Maintain Their Value?
In principle, a stablecoin needs a mechanism that helps its trading price remain close to a target level. If the coin is pegged to the US dollar, the usual goal is to maintain a value close to one dollar per unit. This mechanism depends not only on the issuer’s statements but also on convertibility, the amount of backing assets, market liquidity, and user confidence.
The most common group consists of stablecoins backed by fiat currency or highly liquid assets. Issuers claim to hold assets corresponding to the amount of stablecoins in circulation, while users can purchase or redeem stablecoins through procedures established by the organization. When the market believes that the backing assets actually exist, can be verified, and can be used to meet redemption requests, the peg is generally reinforced.
Even so, users need to distinguish between being “backed” and being “immediately redeemable under all circumstances.” Reserve assets may consist of many different types, with varying levels of liquidity and risk. Redemption rights may also depend on terms of use, jurisdiction, identity verification procedures, or limits imposed by the issuer. Therefore, simply looking at the name or current price is not enough to assess a stablecoin.
Three Major Models and Key Considerations
Stablecoins Backed by Off-Chain Assets
In this model, the supporting assets are generally held off-chain, such as cash, deposits, or liquid financial instruments. The blockchain records the number of stablecoins issued and transferred, but users must rely on the organization managing the reserve assets to determine whether the amount of backing is appropriate.
The model’s advantage is that it is relatively easy to understand and can be connected to the traditional financial system. Its limitation lies in its centralization. Users must trust that the issuer manages the assets as promised, reports information fully, and can process redemption requests when the market is volatile. If information about the reserves is unclear, or if the backing assets lack sufficient liquidity, the stablecoin may face a sell-off even while the blockchain technology continues to operate normally.
Stablecoins Collateralized by Digital Assets
Some models hold collateral directly on the blockchain through smart contracts. Users generally have to lock up an amount of assets worth more than the number of stablecoins they want to create. This difference is known as overcollateralization, which is intended to create a buffer when the value of the collateral falls.
This approach reduces direct reliance on an off-chain custodial institution while allowing much of the data to be monitored through a public network. However, digital assets are inherently highly volatile. If prices fall quickly, the system may automatically liquidate the collateral. Under chaotic market conditions, liquidation may occur at unfavorable prices, increasing pressure on the mechanism as a whole.
Smart contracts are also a source of risk. Programming errors, poorly designed incentives, or problems involving related protocols can affect the ability to issue stablecoins and maintain their value. Transparency of data on the blockchain does not automatically guarantee that the source code is error-free or that the economic model will perform well in every situation.
Stablecoins Based on Algorithms and Market Incentives
This group attempts to maintain value through rules governing token issuance, token burning, or adjustments to the supply. Some models do not hold a corresponding amount of backing assets for the entire value of the stablecoin, instead relying on the expectation that market participants will continue to use and support the mechanism.
The advantage of this approach is its ambition to create a system that is less dependent on assets outside the network. But it is also the most difficult model for ordinary users to evaluate. When the price begins to deviate from the peg, the system needs to create sufficient incentives to bring the price back. If the market loses confidence, mechanisms based on issuing additional tokens or encouraging users to buy may no longer be effective. This can create a downward spiral in which falling prices weaken confidence, and weaker confidence causes prices to fall further.
Why Can Stablecoins Lose Their Peg?
The price of a stablecoin can fluctuate around its target even when the mechanism is still functioning. Small deviations may arise from immediate supply and demand, limited liquidity, transaction fees, or differences between exchanges. A more serious problem occurs when the market begins to doubt the coin’s backing or redeemability.
The first cause is an imbalance between the amount of stablecoins in circulation and the supporting assets. If users all want to redeem their stablecoins at the same time but the reserve assets are not sufficiently liquid, the redemption process may be delayed or subject to unfavorable conditions. The mere suspicion that such a problem exists can encourage many people to sell first, causing the price to deviate even further.
The second cause is liquidity risk on trading platforms. A stablecoin may hold its value relatively well in one market but fall sharply in another if the order book is thin or liquidity providers withdraw. Therefore, the price observed on one application does not necessarily reflect the ability to redeem directly with the issuer.
The third cause comes from counterparty and regulatory risks. A stablecoin concentrated in a single issuing organization may be affected by banking operations, legal procedures, restrictions, or policy changes. Decentralized stablecoins, meanwhile, may face risks arising from governance, smart contracts, and the protocols on which they are built. No model completely eliminates the need to assess the responsible party and the mechanisms for handling incidents.
What Are Stablecoins Used For?
In trading, stablecoins often serve as a unit of account and a means of transferring value between digital assets. Investors can move from a volatile asset into a stablecoin without immediately conducting a transaction in fiat currency, depending on the platform and applicable regulations. Stablecoins are also used in decentralized finance applications, where users can deposit assets, borrow, provide liquidity, or make payments according to the rules of the protocol.
Stablecoins can also support cross-border value transfers and payment activities in systems integrated with blockchain. However, costs, speed, transaction reversibility, and compliance requirements vary between networks. A transaction may be confirmed quickly on a blockchain, but that does not necessarily mean the recipient can immediately convert the asset into fiat currency.
How to Evaluate a Stablecoin Before Using It
First, users should determine which asset the stablecoin is pegged to and how the peg is maintained. They should read the issuance documents, terms of use, and information about redemption rights rather than relying solely on the description provided by an exchange. If the model includes reserve assets, important questions include what those assets consist of, who manages them, and how extensively the information is disclosed.
Next, consider actual liquidity. A token priced close to its peg under normal conditions may not necessarily be easy to sell when the market is under stress. Users should check trading volume, bid-ask spreads, and whether the token is available on reputable platforms. Fragmented liquidity or excessive dependence on a single protocol increases the risk when it becomes necessary to exit a position.
For stablecoins operated through smart contracts, users should pay attention to the source code, governance mechanisms, special privileges held by administrators, and the history of incidents, if publicly available information exists. These factors cannot make a project completely safe, but they help users understand what type of risk they are accepting. In addition, holding stablecoins in a wallet, on an exchange, or in a lending protocol creates an additional layer of risk that should not be conflated with the risks of the token itself.
Stability Does Not Mean the Absence of Risk
Stablecoins address a clear need in the cryptocurrency market: providing a lower-volatility asset for trading and transfers. However, their stability is the result of multiple conditions existing together, ranging from the quality of the backing assets, redeemability, and liquidity to technology and the confidence of participants.
Therefore, stablecoins should not be viewed as risk-free digital cash. Users need to distinguish between depegging risk, issuer risk, exchange risk, smart contract risk, and legal risk. Properly assessing the mechanism behind a stablecoin is more important than simply looking at the name “stable.” When users understand how the asset they hold is protected and where its limits lie, they can use stablecoins more cautiously within the cryptocurrency ecosystem.
