'Shark Tank' star Kevin O'Leary shares 5 pieces of blunt life advice: 'You have to learn how to shut up'

'Shark Tank' star Kevin O'Leary shares 5 pieces of blunt life advice: 'You have to learn how to shut up'

J. Scott Applewhite/AP Photo

Kevin O’Leary, the "Shark Tank" star who sold his software company to Mattel for $4.2 billion in 1999, shared some harsh advice on life and wealth in a recent interview with Business Insider.

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