43-year-old started a side hustle in college with $150 -- now it brings in $200 million a year: It took 'everything that I had'

Seth Berkowitz founded Insomnia Cookies in college to satisfy late-night cravings. The chain, now with over 260 locations, made over $200 million in revenue last year. Krispy Kreme acquired a majority stake in 2018, valuing the company at less than $500 million.