Coin is a term that refers to cryptocurrencies that operate on their own blockchains and are independent of any other coins. A single unit of cryptocurrency can also be called a coin. The term is used to distinguish coins from tokens, which operate on top of their parent blockchain platforms.
The first-ever coin on the cryptocurrency market was Bitcoin (BTC), launched in January 2009. Afterwards, many new coins appeared such as Ethereum (ETH), Fantom (FTM), and Near Protocol (NEAR).
Indenpendent blockchain like Ethereum is capable of creating its own ecosystem of tokens such as Aave (AAVE) and Rupiah Token (IDRT). These tokens are wholly dependent on their parent blockchain.