Yes, that's Buffett and Gates testing out mattresses. And, yes, there's a lesson in here for entrepreneurs

Yes, that's Buffett and Gates testing out mattresses. And, yes, there's a lesson in here for entrepreneurs: https://t.co/n4ShnKBiyJ pic.twitter.com/dKw2T9TKjQ

— MarketWatch (@MarketWatch) June 8, 2017