Wealth September 8, 2016updated 26 Sep 2016 10:56am Billionaire makers: The cities growing the world’s wealthiest By Spear's New York has topped the list of cities where the most billionaires were born, according to analysis by WealthInsight and Spear’s magazine. Content from our partners How Guernsey’s private trustee structures can protect assets Luštica Bay: The Adriatic’s most coveted address AI, growth and public policy: What is the future for Britain? Related Wealth How family offices are becoming the new investors in capital markets Wealth King’s tailor Anda Rowland on the women shaping Savile Row Wealth Why so many wealthy Americans are moving to the UK Spear's