Jim Rogers has warned the US economy will suffer, with inflation and debt problems getting worse as the dollar falls. He pointed to the United States as the largest debtor nation in world history, and predicted that a fate similar to that of the British Empire might happen to the United States. While Janet Yellen argued that the U.S. dollar remains dominant, Rogers highlighted America's massive debt and soaring money printing. He also drew attention to the possibility of an alternative to the dollar and called on investors to protect their funds from the financial crisis. Other economists have also sounded warnings about inflation, the debt crisis and a weakening dollar.