We don't know whether Bitcoin can still make it back to $20k, but with your current losses, I bet it would hurt a lot to sell now. Just forget about it and invest in something else to keep yourself busy.
I think bitcoin will grow a little this coming March-April. Investing with something else will also help you to concentrate to something than to think of your big loses with bitcoin because of its drop price. As I can observe, bitcoin can still go up and still has a potential to increase again.