If you have to buy altcoin from this bearish period, I would suggest that make a deep research of the altcoin that you want to buy, because most of the altcoins now are dead or a priceless coins already. But if you have your reliable source for a potential altcoins that will progress in the future, then it depends in your own decision accompanied with your strong faith..
Yes, doing our own research now matters more than ever before with all the dead projects around us, like dead fish floating on top of the lake. Replying on experts and reliable sources is the way to go.