Buffet said, "If you buy something like bitcoin or some cryptocurrency, you don't have anything that is producing anything". Maybe before this is some kind of true but not anymore. We can buy goods and services using bitcoin and other cryptocurrency like LTC, BAT, etc and a lot of ICO's (the good one and there are some) are creating product that have real use case. So I think either Buffet is outdated coz probably he's old and resisting the crypto revolution or he just preferred to stay in good ol fashion way of investing.