This could go horribly wrong as altcoins can dip further. Altcoins can also vanish from the market as we have seen with some of the altcoins that their founder has exit scam after the pressure of the bear market was too much on them.
In the bear market, Bitcoin is the safest coin to buy as even though it dip further, you're guarantee of an increase when the bull market returns because Bitcoin won't vanish from the market as other altcoins are doing.
Altcoins should be bought when the market is recovering as then you'll be assured of the projects that'll be around the next bull market and it prevents you from buying projects that'll die in the bear market.