In the past Bitcoin has done all sorts of crazy stuff. Going up 50% down 30% up 150%. All sorts of crazy things. It has even gone down 94% from ATH. Yes, crazy as it sounds. It has done this. Since Bitcoin's ATH was roughly $19,000, a 94% drop would equal about $1,140. I really hope this doesn't happen, but it could. This is probably a worse case scenario. (Well worse case scenario is it going to near $0, but this is a very very low probability imo).

On a positive note it could turn around and go up way past 20k. I think it'll be awhile before that happens though.

I am Hodling though. Bitcoin is quite a roller coaster ride and it is very unpredictable.

P.S.
I am very pleased to see BCH lose tremendous value in comparison to BTC. Boooo BCH.