JPMorgan chief executive Jamie Dimon has admitted that he “regrets” calling the cryptocurrency a fraud in September last year. In an interview with Fox Business, Mr Dimon said that he believes blockchain, the technology behind bitcoin, is “real”. The high-profile chief executive added that he is “not interested that much in the subject at all”. “The bitcoin to me was always what the governments are gonna feel about bitcoin as it gets really big, and I just have a different op