Kim Kardashian-West has overtaken younger sister Kylie Jenner as the wealthiest sister, according to the new Forbes rich list.The list, of The Richest Self-Made Women Under 40, discloses the younger Jenner's fall from billionaire status (heaven forbid) and her 39-year-old sister's rise to a whopping $780million (aka £600million) net worth.This news comes after both Kim and Kylie sold chunks of their brands (KKW Beauty and Kylie Cosmetics respectively) to beauty giant Coty earlier this