4) Bitcoin and Ethereum are not comparable.
Sure they are. From the user's point of view, you have coins in your program which you send to someone else. And that's completely the same no matter what lies under.
it depend what you're comparing, the two coins are comparable yes, but the platform and bitcoin not so much, bitcoin can be used on the ETH platform i believe or maybe i'm wrong?
If that is the case, why do we need Ethereum coin? We just need any other coin? Is there a catch here?