What current cryptocurrency projects actually NEED a blockchain?

[Badhuamin]

almost all projects currently use blockchain because the system is good enough to process the project even better.

[dimastegar]

I give an example. Ethereum. They have a project called 'Ethereum Network'. What is clear in it is there are various tokens such as erc-20, erc-777, erc-721, and etc. Here Ethereum has a 'utility' function, that is, every transaction token or ethereum, definitely requires Ethereum as a transaction fee. and that's where the money gathers in the hands of the developer. Correct me, if it's wrong.