For a benevolent bearwhale it's easily possible to break the resistance in a (I suppose) flash-crash to finally get rid of the weak hands that cling on to the "established" resistance. Whenever you are talking about possibilities: Never forget, it is still bitcoin you are talking about. Hence everything is possible!
Benevolent or Malevolent? Yeah sure they could, and most of the times this does work, when we're hovering above support. Last night, though, things apparently didn't go the way the bear whale anticipated. He bearly (pun intended) moved the market, yet paying 10k of BTC for it.