What would you do?
Move onto another coin?
Cry all day long?
Throw your computer in the pool?
Eat 100 bananas?
Buy lots of cheap bitcoin, and start mining.
Nice answer, to buy lots of cheaper bitcoin.
Tricky question, you mean that bitcoin doesn't exist anymore, like vanish from the network?
Huge loss for who have a lot of bitcoin on their wallet, it refers to sell all your coins imho.
Hopefully it doesn't happen as we have great hope in bitcoin and I believe it won't ever happen.