to decide to buy you should not be in a hurry.
to what extent the price decline will occur no one can know for sure, but now it looks like the sharp decline has ended the price has stabilized in the last 24 hours. maybe if you believe that Bitcoin or Altcoin will be able to get back up at a time like this it is very appropriate to buy.
however, I myself believe that the market will recover until I have exchanged my stablecoin for several Altcoins that I believe in.