If a altcoin fail to pump in bull run, then it isn't wise to expect pump from that altcoin when bear controlling the crypto market! That's very common thing and good advise. Actually people buy shitcoins, memecoin as well as many unknown under value altcoins so that they could earn a huge amount of money from those projects, although they already know that they are taking risk as well as they also know that which altcoins will be best and best investment for them. But they decide to buy shit coins and they also suffer a lots for their decision. So I think OP you are right. It is always better to buy good altcoins.
this is only dared to be done by people who are ready to take big risks, because buying just a few coins we have to be prepared to lose a lot of money, because not all coins will give us a profit but if we are lucky then we can get a very big profit in a short time, but it would be better for us to look for safety in coins that really have the potential to invest.