Would there be enough money in the exchanges? Would bitcoin fail?
if everyone withdraws all of their owned assets from the online wallet that it owns may make a slight drop in price but surely it will be for a while because so many want to buy your bitcoin & Fiat.
If it happens to me then bitcoin will fall and finally get to zero. Why? because a lot of bitcoin will catch a little fiat and supply will overwhelm the demand, If everyone pulls money there, I can tell you that there will not be enough money in exchange.