In the future, not all altcoins will die out, but most of the useless projects will increasingly be ignored and marginalized. Only a few coins with strong technology, favorable regulatory views, and good compatibility with other projects will survive and thrive. This is akin to the transition from a crazy period where 'any random coin can rise' to a selective period where 'only good coins can survive.' The reasons for the current state of altcoins are quite simple; initially, all the funds were in BTC. When BTC rises to a high level, only then will altcoins move, leaving them with a very short window of opportunity. When Bitcoin adjusts, if altcoins do not have any particular hotspots, it is hard for them not to decline along with it.