Introduction
Stablecoins are crypto assets that aim to keep a relatively stable value compared with another asset, most commonly the U.S. dollar. People use them to move value between crypto platforms, trade digital assets, and interact with blockchain applications without constantly moving money back into traditional bank accounts.
However, the word stable can be misleading. A stablecoin’s value depends on the system that supports its price. For example, reserves, collateral, liquidity, smart contracts, market incentives, and confidence can all affect its stability.
Therefore, investors should understand how a particular stablecoin works rather than assume that every token priced near $1 will always remain worth one dollar.
How do stablecoins work?
A stablecoin tries to keep its market price close to a target value, often $1. However, different types use different methods to achieve this goal.
Some issuers hold reserve assets and let eligible users redeem tokens. By comparison, other stablecoins use cryptocurrency as collateral within smart contracts. More experimental designs may use algorithms or market incentives to influence supply and demand.
Ultimately, the strength of the peg depends on whether users trust the system. Redemptions, collateral, and market liquidity also need to keep working during periods of stress.
Main types of stablecoins
Fiat-backed
Issuers support these stablecoins with reserves that help users redeem tokens at the target value. Therefore, reserve quality, custody, transparency, and the financial health of the issuer matter.
Crypto-collateralized
These stablecoins use cryptocurrency or other blockchain assets as collateral. Often, the system requires extra collateral to help absorb price swings.
Algorithmic or hybrid
These systems rely partly on algorithms, market incentives, related tokens, or other methods. However, those mechanisms can fail to maintain the target price during periods of stress.
Why do people use stablecoins?
Stablecoins can make it easier to move dollar-like value across blockchain networks. For example, crypto traders may use them as trading pairs or as a temporary place to hold value between transactions.
People can also use stablecoins for blockchain payments, international transfers, decentralized finance applications, and transfers between platforms. In addition, blockchain transactions can take place outside conventional banking hours.
Still, stablecoins are not the same as money in an insured bank deposit. Legal rights, protections, redemption rules, and risks depend on the specific token and issuer.
Stablecoins versus traditional dollars
| Characteristic | Stablecoin | Bank deposit |
|---|---|---|
| Form | Blockchain-based token | Claim on a bank |
| Value target | Usually aims to track a currency | Held directly in that currency |
| Protection | Depends on issuer, structure, and applicable law | May qualify for deposit insurance within applicable limits and rules |
| Transfer system | Blockchain network | Banking and payment networks |
| Key risks | Depegging, reserves, issuer, custody, smart contracts, regulation | Bank, payment, access, and other financial-system risks |
What is depegging?
A stablecoin depegs when its market price moves away from its target value. For instance, a token that aims to trade at $1 might temporarily or permanently fall below that level.
Several problems can cause a depeg. Investors may lose confidence in the reserves, redemptions may become difficult, collateral may lose value, or market liquidity may disappear. In other cases, the system that supports the price may fail.
A small and temporary price difference does not always mean the stablecoin has failed. However, a lasting loss of confidence can make the problem worse as more holders try to sell or redeem their tokens.
Reserve and issuer risk
With reserve-backed stablecoins, investors need to know what assets support the tokens and who controls those assets. For example, cash and short-term government securities have different risks from loans, corporate debt, or volatile investments.
Transparency matters as well. Reserve reports or attestations can provide useful information. However, investors should understand what those reports actually cover and whether they provide the same level of review as a full financial audit.
Even strong reserves cannot remove every risk. The issuer can still face operational, legal, banking, custody, or regulatory problems.
Stablecoins in decentralized finance
Stablecoins play a major role in decentralized finance, often called DeFi. For example, users may lend them, add them to liquidity pools, or use them as collateral in blockchain applications.
However, these activities add risks beyond the stablecoin itself. The stablecoin may keep its peg while a smart contract, lending protocol, bridge, or platform fails.
High advertised yields can also point to extra credit, liquidity, leverage, or smart-contract risk. Therefore, a stable token price does not automatically make the surrounding investment low risk.
Stablecoins and crypto wallets
Like other blockchain tokens, users can hold stablecoins through custodial accounts or crypto wallets. Self-custody gives users control over their keys. At the same time, it makes them responsible for protecting those keys.
The blockchain network matters too. A stablecoin with the same name may exist on several networks. Therefore, users need to check both the token and network before making a transfer.
Risks of stablecoins
Stablecoins can face depegging, reserve, issuer, counterparty, liquidity, smart-contract, custody, and regulatory risks. In addition, some designs are much more complex than others.
Concentration can create another risk. If much of the crypto market depends on a small number of stablecoins or issuers, problems with one major token can affect trading and liquidity elsewhere.
For this reason, stablecoins still fit within the wider risks of cryptocurrency investing, even though they aim to avoid the large price swings associated with assets such as Bitcoin.
Key takeaways
- Stablecoins are crypto assets that aim to track a reference value, usually the U.S. dollar.
- Fiat-backed, crypto-collateralized, and algorithmic stablecoins use different methods to support their value.
- A stablecoin is not automatically equal to an insured bank deposit.
- A stablecoin can depeg if reserves, collateral, liquidity, redemptions, or market confidence weaken.
- Using stablecoins in DeFi creates risks beyond the stablecoin itself.
- Investors should understand reserves, redemption rights, custody, and the specific design before relying on a stablecoin’s peg.