I think its because it grew way to fast in two days it went from 130 to 240 there is nothing that can grow this much in price.
Except for food and water when there is nothing to eat and drink.
I think this was a correction big time but when you look at the charts you can see the bitcoin is stabilizing and even growing in price again.
It just went up to quick but it will go up again eventually, it isn't a total bubble burst its just because people came to their sense.