DraftKings CEO Jason Robins says the new NFL season is off to a great start on the mobile betting platform. He also says the company is investing more money to make sure customers are gambling responsibly. One industry group estimates Americans bet $26.7 billion on last year’s NFL season, and the figure is expected to grow. The overwhelming majority will lose their money. He speaks with Bloomberg's Katie Griefeld, Sonali Basak and Matt Milller