I think is high time you stop listening to people that keep on saying bitcoin will dump to $13k and below. I don't really know the amount you bought your bitcoin in 2020, but you are kind of funny, bitcon wetin to $60k+ but you didn't sell, you decided to sell when it was in $18k which is kind of funny. Even if people keep on predicting that bitcoin will dump to $13k why can't you just continue holding it, you have been holding bitcoin for almost 2 years, even when bitcoin pumped you didn't sell, then you decided to sell when bitcoin is already down, I don't really know to tell you, but it's better you listen to what people have been advising you to do, just buy back and stop listening to people that keep on predicting that bitcoin will dump more. If anybody should worry, it shouldn't be you that have been holding bitcoin for 2 years.
when bitcoin hits ATH above 60k most people are profitable but many people still hear experts predict 100k ATH so many people didn't sell and wait. but in the end, instead of being able to make a profit, they become reluctant holders and when bitcoin drops below 20k they will probably start panicking thinking bitcoin is dying or keep hearing experts predict bitcoin to $13k. they want to sell them for 18k-20k then buy them back for 13k, unfortunately things don't go as they expected.
everyone makes mistakes from time to time, there is nothing to blame, this will be a lesson for OP and like you said OP still has a chance, just buy now and DCA if bitcoin continues to drop OP will get back previous losses soon