Kevin O’Leary, Shark Tank star and money expert, is worth an estimated $400 million. His blunt advice on staying rich includes always paying off credit card balances in full and transferring balances to 0% interest cards for more time to pay off debt. O’Leary warns against combining all finances when married, emphasizing the importance of maintaining separate accounts for financial security. O’Leary’s wealth comes from co-founding SoftKey Software Products, later sold for $4.2 billion.

Read more at Yahoo Finance: Kevin O’Leary’s Most Controversial Money Advice To Help You Build Wealth