What gets me most about this interview is the lack of awareness about what is going on in the world. Cryptocurrencies being adopted is a given but it is not for the reasons talked about here. They will be adopted by failing economies. Ones whose own currencies are worthless. If your own currency is more volatile than a crypto the ordinary people are going to use that crypto because it will still be worth something in a days time. Over time more and more national currencies are going to become worthless and cryptos adopted. This will lead to the cryptos becoming more stable.
It will be a bottom up revolution.