New World Wealth compiled list of fastest-growing cities for the super-rich . Ho Chi Minh City has seen a 296 % rise in multi-millionaires since 2004 . However , it 's Hong Kong that boasts 15,400 millionaires among its borders .
New World Wealth compiled list of fastest-growing cities for the super-rich . Ho Chi Minh City has seen a 400 % rise in multi-millionaires since 2004 . However , it 's Hong Kong that boasts 15,400 millionaires among its borders .