Do you know Max Keizer? Check https://www.publish0x.com/coinbuzz/he-predicts-death-altcoins-and-hard-forks-xmmode ¿Do you think quality of altcoins projects that have emerged in recent times has improved? 
I will take it with a pinch of salt, many people predict lots of alts will be gone by now back in 2018 when the great long lasting blood bath shook the market, but somehow they are still around and kicking, if predictions where to be accurate, i know many could already tell where market would be, it is just a guess work.