Many new altcoins will die in the future because there won't be many investors investing money on them and as we know it we have many scammers here who will keep creating useless tokens and coins, if you are a developer and you think you are serious enough then try as hard as possible to come out with something new and different, enough of repetitive projects and same old ideas
Honestly we cannot do anything about repetitive projects and same concepts based projects. It is complete decentralized space and everyone's success rate is depending on many factors hence people never bother about bringing back same old concept. I mean there were many projects have become successful even they have copied the concept/idea of other projects. Your level of success is highly tied with your promotion level and how intensively you keep attracting new investors.