Take advantage of the low price and buy again

I started in the crypto market last month. Today I decided to make these investments, to take advantage of the market downturn. What did you think of the choice of coins, is there a chance of significant growth? Do I have a good portfolio? How many days does this drop in prices usually last? I confess that I am a little apprehensive, because in less than 12 hours, I have already lost more than 200 dollars 🥹🥲 $BTC #Vetchain