Tony Xu, founder of DoorDash, joins Guy on the Advice Line to answer questions from three early-stage entrepreneurs. Plus, Tony updates Guy on his latest ventures: expanding into grocery and retail delivery - and taking on international markets. First, we hear from Ron in Portland, who’s wondering about the right time to expand his product line - from kitchen knives to cutting boards. Then Kathryn in Raleigh, North Carolina asks if it’s time to raise outside money to expand her line of date sweetened dark Chocolate bars. Finally, Yori in Stanford, Conne...