It's unfortunate, but you entered the market when it was stretched too far after a parabolic upward move. At this point, selling would mean locking in your losses. I would wait a few more days and gauge the movement of price. If it looks like things will recover, then waiting it out is the better option regardless of how long it takes. This is why you shouldn't invest money that you cannot afford to lose. If, on the other hand, prices keep falling (for example if bitcoin remains under 10k), then I would just take the loss and come back in when it looks like things are recovering.

I am simply saying what I would do, not giving you any sort of advise on a course of action.