What is the difference between a coin and a token?
These two words get used interchangeably in conversation and mean genuinely different things. Getting them straight is the difference between reading this market and guessing at it.
A coin is the native asset of its own chain
A coin is built into a blockchain's own rules. BTC on Bitcoin, ETH on Ethereum, SOL on Solana. It exists because the protocol issues it, and it does two structural jobs:
- It pays the network's fees. You cannot transact on Ethereum without ETH, no matter what else you hold.
- It is the consensus reward — the thing block producers are paid in.
Take the coin away and the chain stops working. It is not an application on the network; it is part of the network.
A token is a row in somebody else's ledger
A token is not built into any chain. It is a smart contract deployed on an existing chain, and that contract keeps its own internal table of balances.
On Ethereum the common standard is ERC-20: a contract exposing a handful of agreed functions — balanceOf, transfer, approve, transferFrom. There are equivalents on every programmable chain.
The consequence people underestimate: deploying a token costs a few dollars of gas and takes minutes. Anyone can create one. It can be named anything and use any ticker. There is no registry, no listing committee, no approval. Millions of tokens exist, and the overwhelming majority have never traded meaningfully.
The literacy: a ticker is a label, an address is an identity
This is the practical takeaway of the whole lesson.
A token's real identity is its contract address — a long hexadecimal string unique on that chain. Its ticker is just a text field inside the contract, chosen by whoever deployed it, and nothing stops a hundred contracts from all claiming the same three letters.
Three situations where this bites:
- Impersonation. A fake contract using a well-known name and ticker is trivially deployable and looks identical in a wallet's list.
- Bridged versions. The same underlying asset represented on several chains has a different contract address on each one. "The same token" on two networks is two different contracts, and sending one to the other's address loses it.
- Wrapped assets. Wrapped Bitcoin is an ERC-20 token on Ethereum backed by a custodian holding actual bitcoin. It tracks BTC and it is not BTC — it carries the custodian's risk in a way BTC does not.
Where market data sits in this picture
A price feed showing BTC-USD is a market convention: a symbol identifying a trading pair on exchanges. It is not an on-chain identity, and it says nothing about which contract you would actually be sent if you bought something with that name somewhere else. Both layers are useful. Confusing them is how people end up holding a contract they never checked.
In the data
A year of bitcoin and of ether against the dollar, as a price feed shows them:
Both are coins, native assets with their own chains beneath them, and the feed knows each only by its pair symbol. The same holds across the whole list: EODHD's crypto data covers 1,868 pairs (29 September 2026), and not one of them carries a contract address. The pair symbol is exactly what this lesson says a ticker is: a label, and the only identifier the price side of the world has. Two contracts claiming the same three letters are indistinguishable on a price chart, because neither of them is the thing being priced.
Try it now
- Read the two charts above and say what each one identifies: a trading pair on exchanges, not an address on a chain.
- On a block explorer, use the token search and type a common three- or four-letter ticker. Count how many distinct contract addresses come back claiming it. That number is the lesson.
- Say the rule once, out loud: "the ticker is a label, the contract address is the identity." Unit 2 turns this into a survival habit.