Getty ImagesThis post originally appeared in the Insider Today newsletter.You can sign up for Business Insider's daily newsletter here.Happy Saturday! Gen Z is redefining yet another term, and this time, it's "lavender marriage." A phrase once reserved for the LGBTQ+ community is now being used to describe young people who are sick of being broke and living alone.On the agenda:Step inside Jackson Hole, Wyoming, America's billionaire hub.Taylor Swift is entering her book-publishing era.Uber's new $18 airport shuttle in New York City is a game changer.The hottest new longevity treatment?