Tokens do not always need their own blockchain
Crypto tokens often live on an existing blockchain. Many do not have their own separate network.
This surprises many beginners. A wallet may show many assets, but several can be smart contracts on Ethereum.
So a token is usually a record managed by code.
What a token contract does
A token contract keeps track of balances. It knows how many units each address owns.
It also defines transfer rules. When you send tokens, Ethereum runs the contract and updates those balances.
No tiny token file travels through the internet. Instead, the contract changes its ledger.
Why this is useful
Creating a new blockchain is difficult. It needs validators, security, infrastructure, wallets, and users.
Creating a token on an existing chain is easier. The token can use the security and tooling of that chain.
Therefore, many projects launch tokens before they ever consider their own network.
Coins versus tokens
A coin usually belongs to the base blockchain. Bitcoin belongs to Bitcoin. Ether belongs to Ethereum.
A token is usually built on top of a chain. For example, many stablecoins and governance tokens run as Ethereum token contracts.
The takeaway
Crypto tokens are often smart-contract records. They use an existing blockchain for settlement, security, and visibility.
That is why one wallet can hold many assets without each asset having its own blockchain.