Bitcoin's acceptance is still minimal, and when the crash comes, I am not sure those who are "true believers" will be that firm anymore, especially when they lose a lot of money...
I was here before rise to $30 and the subsequent fall to $2. It's going to take a spectacular event (protocol failure or an improved protocol) to get me to stop using Bitcoin. I'm prepared for massive exchange rate fluctuations.
Agreed. But also, any improved protocol will likely come from the Bitcoin dev team to begin with. These guys have been living and breathing cryptocurrency for the last few years, I can't think of anyone else better prepared to improve on the protocol than them. In other words, the protocol will improve from within, and will remain Bitcoin.
Failure is always an option, but the balance of probability sways away from it with each passing day.