Of course he said that, most of them are scams and somehow its normal. If we look for the first time on coinmarket.com we see over 1500 coins and lets say 150 maximum are traded regulary or know about them.
If we look on different forums or groups where people speak about crypto, again we see tons of new ICOs, new "HUGE/MOON" cryptos, infinite "revolutionary" blockchains and of course all the false news about them spread have a unseen scam from the start or some kind of MLM.
Everytime where are money, will be people who try to take them with any tools.
RE: Crypto World ’Definitely in a Bubble’: Wikipedia Creator Jimmy Wales