Mr. Buffet is a successful investor, but he lives in Paper Money era and Cryptocurrency is the future. And as for future, Bitcoin will be the king among other cryptocurrencies. Also, everything Mr. Buffet says is not single meaning words, Example, when he bought a huge stock of Coca-Cola, in a next interview he just mentioned that he takes his major calory from coke - see, how wisely he advertises what he values in simple interviews?.

Mr. Buffet will invest in Blockchain and Cryptocurrencies just like Mark Cuban or Jamie Dimon of JPMorgan. Also, there could be some reason that Mr. Buffet is thinking of his very own Crypto (maybe buffet coin, hahaha) and he is just making it's way easy against Bitcoin.