Kevin Hart Once Revealed Investing In His Friends' Ideas Had Been An 'Endless Pit Of Bankruptcy' -- In Fact, One Such Idea Was His Worst Investment

Kevin Hart admits investing in friends' ventures was his biggest mistake, such as a headphone company that turned into speakers. Despite early failures, his $400 million empire includes HartBeat Productions and Laugh Out Loud Network, showing the importance of diversifying investments for long-term wealth.