Its remarks are usually objective. He may not say that bitcoin is not good, but many altcoins ICO are not good. These products will cause many investors to go bankrupt, and only a few investors can make money. Bill Gatess remarks are not directed at Bitcoin. What it says is the altcoin.
I think he said about crypto in general, too. And in some respects he is right but it doesn't mean that he needed to generalize and say all cryptos are bad. He said it because of the information he was given.