digital things can not be killed. It bases on the internet and as long as the internet keeps surviving, nothing can harm it. Bitcoin prices may drop but It will never die. BItcoin will exist for a long long time
Bitcoin will surely exist for next 10 years as I don't see any competition to it till that point of time but not sure what will be the scenario after that as the technology gets more advanced then there is a full possibility that it can get replaced by some new technology in future.
I do not think that bitcoin will be replaced in the future. Most likely the one will be improved. But he will remain bitcoin. I believe in the great potential of this currency.
He can not just die like this, this is a unique phenomenon