Recenty Bill Gates conducted an AMA session ("Ask me anything") on Reddit. When questions touched upon the crypto currency, he noted that one of the main positive features of digital assets was the ability to track the financing of terrorism and money laundering, but at the same time blamed the new financial instrument for real deaths.
The main feature of crypto currencies is their anonymity. I don't think this is a good thing. The Governments ability to find money laundering and tax evasion and terrorist funding is a good thing. Right now crypto currencies are used for buying fentanyl and other drugs so it is a rare technology that has caused deaths in a fairly direct way. I think the speculative wave around ICOs and crypto currencies is super risky for those who go long.
Of course, such a statement caused a violent reaction from crypto-communities. Bill Gates now joined another interesting list.
It is worth reminding that in 2015, Gates's rhetoric regarding crypto-currencies was much more positive. For example, he surprised listeners in his interview with Jimmy Fellon, saying that bitcoin could significantly simplify the transnational movement of money and significantly reduce the commission, and "bitcoin revolution must be brought closer".