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 without bitcoin, because we survived back then. But now that bitcoin has been adopted by many people i guess it will be little hard to accept because we are now engage with bitcoin's system. But if ever i guess it will take time for people to accept some kind of situation if ever it will happen.