About 2 months ago she hinted at her interest in cryptocurrencies, then we published a story ( link ) where she said she got to meet Warren Buffett and "asked him his thoughts on cryptocurrency".Now, in a picture of her nails posted to Instagram, she's rocking a different cryptocurrency for each finger - captioning the photo "CrYpTo ClAwS".This is the second story of the week where cryptocurrency crossed over to the music world, as rapper 50 Cent also revealed he owns 700 Bitcoins.