http://uk.businessinsider.com/bill-gates-on-cryptocurrency-2018-2?r=US&IR=T Billionaire philanthropist and Microsoft co-founder Bill Gates said no technology has "caused deaths in a fairly direct way" to the extent that cryptocurrencies have.
He said that the ease with which people can anonymously buy drugs is a major problem, and suggested that cryptocurrencies are used to launder money and fund terrorist organizations.
Gates also added that "the speculative wave" around initial coin offerings and cryptocurrencies is "super risky."
Bill Gates is the same guy who said "64 kB should be enough for anyone". Now he denies the quote is legit, but he sure acted like it, failing to endow DOS and the first Windows versions with proper memory addressing.
Bill Gates is also the same guy who thought the Internet, anarchic network of networks as it used to be, would be a passing fad and everyone would just use the Microsoft Network.