Coin
In simple terms
A coin is a digital money that operates on its own independent network, similar to how the US Dollar is its own currency. Bitcoin and Ethereum are popular examples of coins.
Definition
A cryptocurrency with its own blockchain.
In depth
A coin is a cryptocurrency that operates on its own dedicated blockchain, which serves as a distributed ledger securing transactions through consensus mechanisms such as Proof-of-Work or Proof-of-Stake. Unlike tokens, which depend on existing blockchains (e.g., ERC-20 tokens on Ethereum), coins have their own independent protocol where validators or miners verify transactions and add them to blocks. Each coin typically has its own native governance, transaction rules, and fee structure determined by its underlying network parameters.
How does Coin work?
A coin is the native asset of its own blockchain, so its balances live in the base ledger rather than inside a separate contract. New units are created by the protocol itself: when a miner or validator produces a valid block, the consensus rules let that block include a reward paid to them, and every other node accepts the block only if the amount matches the schedule written in the code. The same coin pays transaction fees and, on proof-of-stake chains, is what validators lock up as stake. Changing issuance means changing the software most node operators run.
An example
Imagine a chain that produces one block every ten minutes and pays the block producer a 5-coin reward. That is 6 blocks and 30 coins an hour, or 720 coins a day. Those coins are created by the protocol, not taken from anyone's balance. A user moving 2 of them also pays the fee in the same coin, so sending an entire balance leaves nothing to cover it. Figures are illustrative.
Figures are illustrative only.
What beginners get wrong
- Coin and token get used interchangeably, but a coin is native to its own blockchain while a token is a contract hosted on somebody else's chain.
- Sending a coin to a deposit address that belongs to a different network is one of the most common ways beginners lose funds permanently.
- Because fees are paid in the chain's own coin, spending the whole balance can strand any remaining tokens in that wallet with no way to move them.
- A low price per unit does not mean a coin is cheap; units are arbitrarily divisible and say nothing about total supply or the size of the network.
Related terms
Part of
What is cryptocurrency, and how does it work? — the subject page for cryptocurrency basics, with all 23 of its definitions in one place.
Educational only — not financial advice.