Would there be enough money in the exchanges? Would bitcoin fail?
If EVERYBODY wanted to dump all their BTC, the price would go to ~$0/
BTC... So yes, in this case there would be enough FIAT on the exchanges.
It's all supply and demand. If the supply is huge and the demand is 0, the price goes trough the floor.
But in this bitcoin this is impossible that bitcoin price will drop at zero value since there are bitcoins are stuck from wallet online or we can say lose coins so the price of bitcoin will not getting lowest price of bitcoin..
this is impossible people will not waste their investment in bitcoin they will hold them for a long time and sell in the right to get profit when the price was really expensive..