(CNBC) — After graduating from college, Grant Cardone was broke and swimming in $40,000 of student debt, he writes in his new book, "Be Obsessed Or Be Average."
By 30, he'd made his first million. Since then, the 58-year-old has built five companies and a multi-million dollar fortune.
The self-made millionaire refuses to play by anyone else's rules, particularly when it comes to saving money.
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"I would never, ever invest money in a 401(k)," Cardone tells CNBC. "Why would I go to work, have my employer give me another $6,000 a year, and then take that money and send it off to Wall Street, where I can't even touch it for 30 years? I wouldn't do that."