Basically there are people who have been shorting bitcoin (with diminishing effect, interestingly) for the past month. The surprising thing is that the shorting peak starts AFTER price has its major drop from $60k+ to $40k (peak #1) and has been growing a lot in the past week or so (peak #2 and #3 that is 2000% increase) without price seeing any more major drops! Which means most of them have been losing a lot of money which could explain why there is a lot of desperate FUD trying to bring the price down so that their shorts can give them some profit.
Basically these people are borrowing bitcoin to sell it (create a sell pressure that didn't exist otherwise) hoping that the price goes down so they can buy back more bitcoin "in the dip", pay back what they had borrowed and be left with some extra satoshis. When price doesn't go down they lose money because they have to pay back what they borrowed and usually have to buy back at a higher price.
I'm starting to shape a theory that at this point, despite being in a reverse bubble™ the only reason why price isn't shooting above $40k is these shorts and the big rise will start as soon as these shorters lose enough money to be discouraged to continue doing it or simply run out of money to burn.