Bitcoin was mean to be p2p cash. It has no legitimate use case anymore as it obviously failed to be p2p cash.
Ethereum tried to be many things mostly a decentral computer. Turned out to be a super expensive decentral computer and that it isn't really so decentral in the current version.
However its technically used this way by some people so that de-facto means it has a valid use case.
It can hardly compete against newer similar projects but thats another story.
Ethereum tried to be many things mostly a decentral computer. Turned out to be a super expensive decentral computer and that it isn't really so decentral in the current version. However its technically used this way by some people so that de-facto means it has a valid use case. It can hardly compete against newer similar projects but thats another story.