All altcoins are good it will only depends upon on its growth. Naming is hard to do, because we really dont know the exact future of that specific coin. So maybe to become more comfortable try make your research. Try to read all the information about that coin and stay active on their site. In that way we can really trust the coin we will gonna invest with.
There is no way all altcoins are good, if that was the case we will not need to make any kind of research since you could invest in any coin and get good profits, good projects are outnumbered 10 to 1 and the ratio may be even worse than that, so please if you are going to make any kind of investment do your due diligence and take nothing for granted or you will lose your money.