In this life, there's always possibility that something will be created more powerful than the existing one. So for me, I don't take no for an answer here. ~
Do you really think any new coin may overtake bitcoin marketcap in future, while people are dreaming to see bitcoin price at new higher range in future. Even cryptocurrency user don't think that eth can overtake bitcoin even though it is at second position at marketcap. Nowadays we can see a lot of new project but most of them ends as scam. So I will prefer to say no about it.