I don't consider Bitcoin is a bubble, I read recently that we are about 18 million who own crypto currencies.
When I think about blockchain technology, I can't believe that only 18 million people will want to benefit from it.
It's like those who said in 1996 that no one would want to communicate via email or online chat ahah, and you know what's been going on since, people show their entire lives to strangers just to be hip and have followers

Definitively, Bitcoin is not a bubble and will never be one.