He has been positive about bitcoin, then negative, then positive again, now he is negative again. What's this guy's deal?
Bill Gates is a dinosaur like Buffet 
https://bitcointalk.org/index.php?topic=3644374.0
https://www.ccn.com/put-your-money-where-your-mouth-is-winkelvoss-dares-bill-gates-to-short-bitcoin/