First thing, bitcoin can't die overnight.
Second, people are getting crazy about all cryptocoins not only bitcoin so this trend might remain same if there will be no more bitcoin.
People are investing in bitcoin because it has limited supply and no any government can shutdown bitcoin network. People find it much safer to store their wealth in bitcoin than in their local banks.
thats right, possibilities that bitcoin can die is around 10% lower for my opinion. For now there are so many people saw how the bitcoin price grow and want to invest it.