Its just the average of all the price drop after its new ATH which is quite known to the cryptocurrency investors, I am also expecting the next lowest low price will be around 20K that is the perfect time for big and long term investment but don't forget that the price dropped to sub 30K at some point earlier still the price managed to recover and reach mid 45K in no time.
Never say never when it comes to Bitcoin, but I would not bet that the price of BTC will go so low - which would mean as much as 50% loss in value at the moment. I think we hit bottom to about $28k after we hit $69k, and that's the biggest negative price difference that will happen after halving 2020.
I’m not saying it’s impossible to go that low, but there would have to be some very negative reason that would cause a great deal of panic in the market. This is, of course, the x-factor that is completely unknown and should be counted on, but at the moment I tend to believe that there is a much greater tendency for the price to increase than to go into such drastic declines.