David Chang, Chef answered:
The big questions for me that keep me up are: Are we going to stay in business? How am I going to take care of everybody? Not that it’s my sole responsibility, but certain actions that I take now, I am now fully aware [how they] have repercussions that affect hundreds of people. So it’s a lot to think about. That’s what keeps you up all day, pretty much, is how to make sure we keep the business afloat.