That said, some altcoins like Ethereum, Ripple,Bitcoin Omni, and NEO have their blockchains. Others of not.Tokens: Tokens are the digital representations of a particular asset or utility in a blockchain. All tokens can be termed altcoins, but they are differentiated by residing on top of another blockchain and not being native to the blockchain on which they reside.They are coded to facilitate smart contracts on blockchain networks like Ethereum, and we can transfer some from one chain to another.