I think we can survive without bitcoin but it is not easy. Because were already adopts the use of bitcoin for long. Many people already used bitcoin its features so it is not easy but it will take time to one person can accept the situation.
We can survive, but as long as a few computers on the network run the bitcoin system, bitcoin will survive. Only one extreme case can lead to its destruction. In the coming years, it may still be the largest cryptocurrency in the market, unless the bitcoin community is ruined by greed or carelessness.