After all, the two men aren’t exactly known for being tech-savvy, and have missed out on big trends in the past, such as e-commerce. Read More. Mark Zuckerberg on how to be a multi-billionaire and not raise spoiled kids. Bitcoin is “one of the crazier speculative things,” Gates says. Don’t miss: Here’s what can happen if you don’t pay taxes on bitcoin. There are certainly valid arguments to be made that Buffett and Munger “just don’t understand” bitcoin and other cryptocurrencies.