Andreessen doesn't share Warren Buffett's views on cryptocurrencies however, saying that he takes them "very seriously. ": The best investment advice Marc Andreessen has ever heard is from Warren Buffett, the tech legend and venture capitalist told Bloomberg's David Rubenstein in a recent interview. Berkshire Hathaway CEO Buffett, who has a net worth of about $101 billion, is famous for the strategies he has used to become one of the most successful investors of our time. One that's often quoted is this: "Keep all your eggs in one basket, but watch that basket closely."