Running a cryptocurrency exchange can be enormously profitable -- so long as you don’t lose your clients’ assets to hackers. Japan-based Coincheck Inc., which suffered one of the biggest heists in history, earned 53.2 billion yen ($490 million) from April 2017 through January, when the theft occurred, according to its new owner Monex Group Inc. By comparison, Japan Exchange Group, which owns the Tokyo Stock Exchange and Osaka Exchange, earned 66.1 billion yen for all of 2017, according to data compiled by Bloomberg. The figures illustrate how lucrative it’s been to operate a cryptocurrency venue in the past year, a ... (full story)