"If you want to be successful you have to live on 3 hours or 2 hours of sleep" ... "stay up for 3 days" ... "forget to eat" ... "sleep is for those people who are broke"
I believe he's deliberately saying these things to shock the kids he's talking to into listening carefully. By challenging their assumptions about what it takes to succeed, he's hoping to get them to change their behavior. Maybe they sleep 7 hours instead of 10 + naps and spend 2 out of 3 of those extra hours doing productive work. That could make a really big difference in their lives.