What did Bill Gates say about cryptocurrency?

As a keen observer of the financial landscape, I'm curious to know what Bill Gates, a renowned technologist and business magnate, has said about the ever-evolving world of cryptocurrency. Given his profound understanding of technology and its implications for society, his opinions are often highly influential. Has he expressed support for the potential of cryptocurrencies to revolutionize financial transactions? Or has he voiced concerns about their volatility, lack of regulation, and potential for misuse? Understanding Gates' stance on this topic could provide valuable insights into the broader discussion surrounding the future of digital currencies.