Altcoin will not die. If you see ETH, NEO , ADA and many others, they have great potential and projects. Currently all the alts are down because Bitcoin itself is down and also Bitcoin Dominance is decreased to 36%.
The only thing we can do now is to buy them cheap and wait for things to be recovered.
What he is trying to say is that all the tokens without any use case will eventually die, sooner or later. You have listed 3, but there are thousands. Right now there are loads of useful and useless tokens, and still both of these types are speculative. People buy tokens without any use cases just to resell them at a higher price, it works now but it will end in the future. In 2014 there were various coins too, even though they were useless, they were traded at high volumes. Right now they cost zero, this is what to expect for the majority of the tokens you see on coinmarketcap now.