About 129,557 ultra-high-net-worth individuals around the world are under the age of 40, according to Knight Frank’s 2022 Wealth Report. Getty Images
About 129,557 ultra-high-net-worth individuals around the world are under the age of 40, according to Knight Frank’s 2022 Wealth Report. Getty Images

Millionaire boom: number of world's super-rich surged in 2021