Super-rich investors buy gold by ton

``The world's wealthiest people have responded to economic worries by buying gold by the bar -- and sometimes by the ton -- and by moving assets out of the financial system, bankers catering to the very rich said on Monday... "They don't only buy ETFs or futures; they buy physical gold," said Stadler, who runs the Swiss bank's services for clients with assets of at least $50 million to invest.''