What Is Token in Crypto?

A token is a digital asset issued on an existing blockchain, represented by a smart contract. USDC, UNI, LINK, and most assets traded on DEXs are tokens. On Ethereum, the ERC-20 standard defines fungible tokens; ERC-721 defines NFTs; ERC-1155 unifies both. Tokens are distinct from "coins" — native assets of their own blockchain like BTC or ETH.

Also known as: crypto token, digital token

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Token vs coin

The terms are often used interchangeably but have a specific technical distinction:

  • Coin — the native asset of its own blockchain. BTC on Bitcoin, ETH on Ethereum, SOL on Solana, ADA on Cardano. Required to pay gas on the native chain.
  • Token — an asset created by a smart contract on an existing blockchain. USDC, UNI, LINK, DAI, SHIB. Uses the host chain’s gas; doesn’t require running a separate blockchain.

The distinction matters for infrastructure and risk — a coin’s security is its chain’s security; a token’s security depends on both the chain it lives on and the specific smart contract that issues it. A bug in a token contract (misconfigured mint permissions, for example) can be catastrophic even when the underlying chain is healthy.

Token standards

Ethereum’s token standards became the de facto industry templates:

  • ERC-20 — fungible tokens (USDC, UNI, LINK). Every unit is interchangeable.
  • ERC-721 — non-fungible tokens (NFTs). Each token has a unique ID.
  • ERC-1155 — multi-token standard. A single contract can mint both fungible and non-fungible tokens.
  • ERC-4626 — tokenized vault standard. Used by Yearn, Morpho, and other yield-bearing positions.

Other chains have analogous standards (SPL on Solana, BEP-20 on BNB Chain, TRC-20 on Tron) that mostly mirror ERC-20 semantics.

Token categories by function

  • Governance tokens — UNI, AAVE, MKR. Confer voting rights in a DAO.
  • Utility tokens — pay for access to a protocol’s services. Filecoin’s FIL, Helium’s HNT.
  • Stablecoins — USDC, USDT, DAI. Pegged to an external asset.
  • Liquid staking tokens — stETH, rETH, mSOL. Represent staked position + accrued yield.
  • Memecoins — DOGE, SHIB, PEPE, WIF. Community-driven assets with little-to-no utility beyond speculation.
  • Real-world-asset tokens — BUIDL, USDY, FOBXX. On-chain representations of off-chain assets.

Risks and considerations

Because anyone can deploy a token contract, the long tail of “tokens” includes vast numbers of scams, honeypots, and low-effort clones. Defenses:

  • Verify contract addresses — don’t trust the ticker symbol alone. CoinGecko, the project’s official site, and established explorers all publish the real address.
  • Check contract ownership + mint permissions — if an admin address can mint unlimited supply, your tokens are only as valuable as the admin’s goodwill.
  • Honeypot detection — tools like Token Sniffer, HoneyPot.is, and DEXscreener flag tokens you can buy but can’t sell.
  • Liquidity and locks — verify that LP tokens are locked (or better, that the liquidity is protocol-owned). Unlocked LPs let the team rug-pull.

For traders, treat every new token as a scam until proven otherwise. The bar is low because the downside is high: rugs and honeypots can zero out an entire position in one transaction.

Related terms

Coin A coin is the native asset of its own blockchain — BTC on Bitcoin, ETH on Ethereum, SOL on Solana. Altcoin Altcoin is crypto shorthand for any coin or token that isn't Bitcoin. Tokenomics Tokenomics is the study of a crypto token's economic design — supply schedule, distribution, utility, value accrual mechanisms. Smart Contract A smart contract is code deployed to a blockchain that runs when invoked and whose execution is guaranteed by the network's consensus.