An amateur investor turned $15,000 into $1 million then lost it all, the latest cautionary tale in the day-trading frenzy

· Robinhood-user Richard Dobatse said he turned $15,000 into $1 million, and then lost everything.
· He told the New York Times: "They make it so easy for people that don't know anything about stocks. Then you go there and you start to lose money."
· He said he is planning to appeal his case to financial regulators for...