Lucy Guo attends as Passes presents Lucypalooza 2024 during LA Tech Week on Oct. 16, 2024 in Beverly Hills, Calif. Getty Images for Passes Lucy Guo, the 30-year-old co-founder of high-flying A.I. startup Scale AI, just dethroned Taylor Swift as the youngest self-made female billionaire. With a net worth nearing $1.3 billion, Guo landed at […]