They became less popular since the dev made poor performance to introduce their project to a lot of potential investors. Also it means that they don't have good fundings to support it and to market it that's why its so risky to acquire this tokens since its like you are just wasting your money for that tokens. Much better if you invest on best tokens which already have good strong community support since he gets more chance to see a good pump on those token and might earn good profits compare on trying to take a risk on those unpopular tokens since for sure nothing to gain for that investment decision. Some caught up on idea that its easy for them to take their position and they just need to wait for a lot of people to accumulate then they became so lucky to buy at first. But this kind of scenario is hard to happen that's why its better for them to invest on those options that give them more better chances to gain.