I think your friend is right. Many of the altcoins will die surely as most are not even sticking to their roadmap plans. I will advise people to focus only on projects that are working and operational or better still just invest money in the top coins Btc and ETH
In 2017, there was craze about altcoins and everyone was thinking that many altcoins will go high in value like bitcoins. but that did not happen and now everyone has realized that a lot of money is gathered in the name of altcoins and there are no real projects behind. The Altcoin season may come again but it will not be as big as the previous one when even the shitcoins gave good profits.
This time around only the best altcoins will survive and rest will die.