At 19, Seth Freedman ditched his university place to take a job at a City stockbrokers. It was 1999, the height of the dotcom boom, and within months he was handling millions of pounds of client orders. He dealt for Swiss banks, traded bonds in Geneva, then left to take his client base to a London brokerage. He got out before the 2008 crash and wrote a series of articles for the Guardian, which generated a massive reaction from readers.