Everyone's got an opinion on how much you should have saved by your 30s—but Kevin O'Leary isn't just tossing ... recommends having at least one year's salary banked by age 30, then doubling ...

Kevin O'Leary fired off a post on X earlier this month that was part confession, part humblebrag. It started with a cat swab and ended with millions in his pocket. In classic Mr. Wonderful fashion ...