https://www.complex.com/life/2018/05/bill-gates-thinks-bitcoin-cryptocurrency-are-poor-investments
How did you come to that conclusion. Absolutely all of his public statements are the opposite. He even said crypto is killing people earlier this year. That's not slightly cautious; that is out and out dislike. I linked the two most recent articles that I've read from him stating his dislike for crypto. He hasn't said anything publicly that makes me think he's changed his opinion since May.
I could be absolutely wrong, but I'd have to see sources that show he's somehow done a 180 in the last two months.