Berkshire Hathaway vice chairman Charlie Munger says the U.S. government needs to follow China's strategy to ban crypto.   "A cryptocurrency is not a currency, not a commodity, and not a security," says the 99-year-old renowned investor.  Munger and his business partner Warren Buffet are crypto skeptics who believe that Bitcoin and other cryptocurrencies are not tangible or productive asset classes.  Munger believes that crypto needs to be banned because it encourages a gambling mentality, and the federal government needs to act now.  He used two "interesting precedents" to encourage appropriate action:  First, follow China in banning services that offer trading, order matching, token issuance, and derivatives for virtual currencies. Second, during the 1700s, the English Parliament banned all public trading in new common stocks for 100 years.