A coin is a cryptocurrency that operates on its own native blockchain and is primarily used as a form of digital money. In practice, a coin is both a network’s core asset and a unit of account on that network, used to pay transaction fees, transfer value, and reward participants who help secure and run the blockchain.
How coins work on native blockchains
Coins are native to the blockchains they power. For example, Bitcoin (BTC) is the coin of the Bitcoin network, and Ether (ETH) is the coin used on Ethereum. When you send BTC, the transaction is recorded on Bitcoin’s blockchain and fees are paid in BTC. On many networks, coins also play a key role in security. In proof-of-work systems, new coins can be issued through mining as rewards for validating blocks. In proof-of-stake systems, coins are staked to help validate transactions and maintain consensus, and validators earn rewards in the same native coin.
Coins vs. tokens, and common categories
A common point of confusion is the difference between coins and tokens. Coins are native assets on their own blockchains, while tokens are typically created on top of an existing blockchain using smart contracts. For instance, a stablecoin or governance asset may be a token issued on Ethereum, while ETH itself is the coin.
Coins can also be grouped by role. Some act mainly as payment and settlement assets, others support smart contract platforms, and some aim to track external values, such as fiat-pegged assets issued as native coins on certain chains.
Understanding what a coin is matters because it helps you assess how a crypto asset is issued, where it lives, what powers its transactions, and what security and utility it provides within the broader blockchain ecosystem.