In my opinion, there's no way bitcoin can die out from cryptocurrency. If Bitcoins happens to die then all other crypto coins will be nothing because bitcoin has an influence on other coins.
Well I think that Bitcoin is not going to disappear do not worry. If it disappeared, it will hurt many investors and companies which are using Bitcoin as a mainstream and the ease of making thing happen will no more be there so I think this will be a terrible scenario. It would be great to have a nice thriving Bitcoin market and a prolonged bull run.