Well the idea idea of cryptocurrency is here to stay.
Cryptocurrency is very convinient and secure.
The question is will it bitcoin?
I think the answer is yes because businesses like overstock.com and microsoft have already started accepting it and they probably don't feel like the minor changes other crypto currencies offer are worth the hassle of switching.
Accepting it is one thing, actually holding it in their cash reserves is another.
In most cases 'Accepting' just seems to mean autoconverting to dollars with bitpay - except for overstock which is actually claiming to hold some - are there any others?