I'd say that whenever some of these billionaires raise their voice on any topic, there is always an agenda backing their statements. Bill Gates is one of those guys who at first had a positive opinion about Bitcoin and once he realized that he is at odds with Buffett and he'd better be protecting Berkshire Hathaway's portfolio, he simply backpedaled and said that cryptocurrencies are killing people.

Novogratz is one of these guys that as soon as they start talking negatively about Bitcoin, you can tell with relative certainty that he sold most of his holdings into a bull run and now wants to buy back cheaper. I am still hoping for Peter Schiff to disclose his Bitcoin holdings He is one of the very few who stood by their word (for what is publicly known).