'Shark Tank' star Kevin O'Leary's next project is movie acting. He says he loves it when 'people say I can't do something.'

Kevin O'Leary is a "Shark Tank" investor.

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• Kevin O'Leary says he'll never retire as he's a "vampire" who can keep working forever.
• The "Shark Tank" investor said trying new things has been key to staying healthy as he's aged.
• O'Leary discussed his first movie role and said navigating "volatility" is part of life.

Kevin O'Leary plans to keep working until the day he dies — and beyond.

"I'm never going to retire," he told Business Insider in a wide-ranging interview.