What is the difference between a stablecoin and a cryptocurrency?

A stablecoin is a cryptocurrency designed to hold a constant value against a reference such as the dollar, usually through reserve backing. Other cryptocurrencies have no price target and trade on market demand alone. It is a difference of design goal rather than of underlying technology.

Is a stablecoin a cryptocurrency?

Yes. Stablecoins are a subset of cryptocurrencies, not a separate category. On an EVM chain a stablecoin is an ordinary token contract, transferred by the same mechanisms, paying the same network fees, and requiring the same key management as any other token.

Can you pay gas with a stablecoin?

Usually not. Network fees are paid in the chain's native asset, so an account holding only stablecoins cannot submit transactions. Some account abstraction arrangements let a paymaster cover fees, which removes the requirement from the account and introduces a dependency on the sponsor instead.

Are all stablecoins backed by reserves?

No. Most widely used ones are backed by reserves held by an issuer, but designs have existed using crypto collateral with overcollateralisation, and others relying on algorithmic mechanisms with little backing. That last category has a poor track record, so how stability is achieved matters more than the shared label.

Stablecoins vs Other Cryptocurrencies

A stablecoin is a cryptocurrency designed to hold a constant value against a reference such as the US dollar, usually by being backed by reserves. Other cryptocurrencies have no such mechanism and their price is set entirely by the market. The distinction is a design goal, not a different technology.

What actually differs

The design goal. A conventional cryptocurrency has no target price. Its value is whatever the market says, and volatility is expected. A stablecoin targets a reference value and is constructed to hold it. Everything else follows from that.

How stability is achieved. The common approach is reserve backing: the issuer holds assets against tokens outstanding and supports minting and redemption at the reference value, so arbitrage pulls the market price toward it. Other designs have used collateral in other crypto assets with overcollateralisation, or algorithmic mechanisms without meaningful backing. That last category has a poor record, and the distinction between backed and algorithmic matters far more than the shared label suggests.

Who issues it. Most cryptocurrencies are issued by protocol rules with no company behind them. A fiat-backed stablecoin has an issuer who holds reserves, can typically freeze addresses, and is subject to regulation. That is a different trust model, and it is the trade being made in exchange for stability.

What it is for. Volatile assets are held for exposure or used for network functions such as paying gas. Stablecoins are used to price and settle things, because a price quoted in something that moves ten percent in a day is not a usable price.

Both are still tokens on a network

Mechanically there is less difference than the framing suggests. A stablecoin on an EVM chain is an ERC-20 contract, transferred by the same mechanisms as any other token, subject to the same network fees and the same key management. It does not get special treatment from the network, and it usually cannot pay its own gas, which is why an account holding only stablecoins still needs the network's native asset to transact. The distinction is economic and institutional rather than technical.

Why payments use one and not the other

Pricing needs a stable unit. A service charging a fraction of a cent per call cannot quote that in an asset whose value moves, because the price would have to be recomputed constantly and both sides would carry exposure between agreement and settlement. This is the main reason machine payment schemes settle in stablecoins.

Accounting is straightforward. Revenue in a dollar-referenced token is revenue in something your books already understand. Revenue in a volatile asset creates a treasury decision on every receipt and a gain or loss to track.

Exposure between events is real but bounded. Even with a stablecoin, the interval between quoting and settling carries some risk, and a depeg during that window is a genuine if rare failure mode. With a volatile asset the same interval is a live exposure on every transaction.

The volatile asset still has a job. Gas is paid in the network's native asset, so any system settling in stablecoins also holds a small balance of something volatile. That is a funding and monitoring concern rather than a pricing one, and forgetting it is a common way for an otherwise correct integration to stop working.

Stability is a claim, not a guarantee. It is engineered, and engineered properties fail. Treating a stablecoin as though it cannot depeg produces systems with no handling for the case where it does, and the correct posture is to hold small balances and distinguish permanent failures from transient ones.

Where the volatile asset is still the right choice

It is worth being clear that stablecoins are not simply better. Where the purpose is exposure to a network or an asset, a stablecoin is the wrong instrument by construction, since holding a constant value is the opposite of the goal. Where a protocol needs an asset for its own security or governance, that asset has to be the network's own rather than a claim on an outside issuer, because depending on an issuer would import a trust assumption the protocol exists to avoid. And for payments in contexts where no issuer is willing or able to operate, a permissionless asset with no issuer is the only option available. The reason payments between agents settle in stablecoins is not that stablecoins dominate generally; it is that pricing and accounting both want a stable unit, and machine payments are mostly a pricing problem.

Frequently asked questions

What is the difference between a stablecoin and a cryptocurrency?: A stablecoin is a cryptocurrency designed to hold a constant value against a reference such as the dollar, usually through reserve backing. Other cryptocurrencies have no price target and trade on market demand alone. It is a difference of design goal rather than of underlying technology.
Is a stablecoin a cryptocurrency?: Yes. Stablecoins are a subset of cryptocurrencies, not a separate category. On an EVM chain a stablecoin is an ordinary token contract, transferred by the same mechanisms, paying the same network fees, and requiring the same key management as any other token.
Why do agent payments use stablecoins?: Because pricing requires a stable unit. A per-call fee quoted in a volatile asset would need constant recomputation, and both parties would carry exposure between agreement and settlement. Stablecoin settlement also makes revenue directly comparable to existing accounting without a treasury decision per receipt.
Can you pay gas with a stablecoin?: Usually not. Network fees are paid in the chain's native asset, so an account holding only stablecoins cannot submit transactions. Some account abstraction arrangements let a paymaster cover fees, which removes the requirement from the account and introduces a dependency on the sponsor instead.
Are all stablecoins backed by reserves?: No. Most widely used ones are backed by reserves held by an issuer, but designs have existed using crypto collateral with overcollateralisation, and others relying on algorithmic mechanisms with little backing. That last category has a poor track record, so how stability is achieved matters more than the shared label.