JOHN STEPEK

John is executive editor of MoneyWeek magazine, and author of The Sceptical Investor, a guide to contrarian investing. Topics he has covered previously in his regular Business Traveller column include digital “challenger” banks and investing in gold. This month he asks whether the unicorn bubble may be about to burst given the recent high-profile flops of privately backed start-ups when brought public on the stock market – see page 52.