Yes I'm convinced that many altcoins will die osomeday. You might ask why and my answer is simple, because many projects have basically no use case at all while some are not even brought forward anymore due to a lack of developers or other reasons....
It's honestly just crazy to see that some of those projects are valued in the millions without even having delivered a single thing on their roadmap. It's nothing else than pure speculation by some people that keeps those tokens alive.
That being said I sometimes question the investment skills of some people within the cryptosphere. I mean why the hack would you put any money into thin air? Into something that doesn't even exist neither show any progress on github after all?
I personally am therefore only investing into products that show some progress and are actively engaging with the community about it. What's your approach on selecting the tokens you put your money on?