It completely depends on the reason of why it crashed. If it's just plain 'ol market volatility, then sure, chances are it will rebound back up in the future. But if it's something like the developers abandoning the project(which is very very unlikely in my opinion) then it might not recover if no one is going to continue to work on the project.
The chances for it rebounding is even huge than it not unless bitcoin has been totally subdues by the government and the press that everyone is just scared of buying into btc but we all know how impossible that can be as bitcoin has gotten past the little man stage to a growing man right now. You have said, it is unlikely, but even if it happens, that would just be a chance for some of us who are believers but came into the show late.