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.
One thing is for sure that the investors who have invested their moneyinto any of the crypto currency and then made out some good amount of profit will never ever cash out any of the crypto coins back into paper money as they know this will make them rich one day. However, in case this thing ever happens, then this will result in complete disaster of the entire crypto market as the rates of the crypto coins will go down.