I think Crypto currencies will survive more than that, but i think there will be a better leading currency other than BTC
I dont think so, i am not sure no can say what can happen in the future, But i am hoping that it will happen because bitcoin can help many people and can open many oppurtunity for all people, so i am hoping it will survive in the next 100 years and im still confident if that will happen, bitcoin will still be the best crypocurrency.