Those who believe in what he says do not believe what can altcoins can do in peoples lives. It is only his idea in all altcoin , maybe he was scam by some of the ICO that he participated and invested into that is why he believes that all altcoins are scams. But the truth is , most of the altcoins may be scam but that he mentioned are definitely the legit one. Etherium is one of the altcoin in the world of crypto currency that have the biggest potential to attain what bitcoin did.