The ‘Shark Tank’ star says he doesn’t invest in founders that look like they don’t sleep.

BY MARIAPAULA GONZALEZ, EDITORIAL INTERN

Kevin O’Leary. Photos: Getty Images

For many founders, late nights at the office and nonstop schedules are all part of the routine. Kevin O’Leary, however, is pushing back on that mindset, arguing that young entrepreneurs should stop worshipping 18-hour workdays.

“How stupid is that? You gotta get some sleep, you have to eat well, and you gotta stay focused,” O’Leary said in an Instagram video posted Thursday. “That’s how you’re successful.”

Yet many business leaders run on........

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