A lot of things can happen in just a hundred of years, that is too much time, and it is impossible to predict how long can bitcoin last. And we can not even know if bitcoin will survive by next year, it is not possible.
But there have been a lot of changes in bitcoin last year, and i think that has been the best year for bitcoin. I think that we are facing a lot of events, and we can not predict what is going to happen in 100 years..