With economic and fiscal weakness crimping the developed world, Soros said all investments are at risk because "this is a period of great uncertainty so nothing is very safe."
"Gold is the only actual bull market currently. It just made a new high yesterday. In the present circumstances that may continue," he said at a Thomson Reuters Newsmaker event.
"I called gold the ultimate bubble, which means it may go higher. But it's certainly not safe and it's not going to last forever," he said.
Soros in January at the World Economic Forum in Davos, Switzerland, made the ultimate bubble comment. He no longer is involved in management of his hedge fund.
He also talks about a double dip recession and Japan's currency intervention