Many community members have been claiming lately that altcoins are going to die or at least that 90% of altcoins are doomed. I tend to agree with them that there are many coins and tokens that are pointless and won't survive. Another cathegory are alts with solid foundations but won't manage to fight with their competitors as naturally there are numerous projects with same visions. But if you trust the project you invested in, there is no reason to change your mind just because someone says many altcoins won't succeed. Do your research and trust only your own judgement, because many ALTCOINS ARE HERE TO STAY!
According to the Number of Altcoins that currently exist then yes I think everybody understands that many won't survive, however I would not give such a substantial rate. There are many promising coins that will at present show themselves.