But would it make sense to buy if everyone is going to buy as many as possible and hold on to it.
I don't think that bitcoin can drop to just $1 by looking at the user database of it, because the coins that drop wildly are those which has no users to buy or sell them and if a coin has countless users and investors or sellers then how can that drop to that point?
Yes there would be a big problem if bitcoins price would drop low like that and surely many investors would lost its faith in bitcoin or some may panic buying if the price gradually decrease its price. There were still high risk takers still hold or even buy more bitcoin if the price would drop to the lowest.