I am not an expert with Bitcoin numbers and trading charts, but I am guessing that what happened can be considered as just one of the normal things here. This is in fact a very healthy thing, in the long run. BTC is now back at $32,000+ so the dump was just a temporary thing which can happen if there will be profit-taking by big investors and holders of the assets. I am sure they are now back holding what they sold and smiling for the profits made.