Kim Kardashian opened up about where her biggest money-making opportunities lie after nearly 15 years as a reality star.The Keeping Up With the Kardashians star, 39, got real about her finances on season 3 of Netflix’s My Guest Needs No Introduction With David Letterman and why ending the E! series won’t affect her bottom line.“We would not be who we are today without Keeping Up With the Kardashians and that’s why we continue to share our lives,” she explained to David Letterman on the show,