"Traditionally, empires that hold the global reserve currency are also net foreign creditors and net lenders. The British Empire declined—and the pound lost its status as the main global reserve currency—when Britain became a net debtor and a net borrower in World War II. Today, the United States is in a similar position. It is running huge budget and trade deficits, and is relying on the kindness of restless foreign creditors who are starting to feel uneasy about accumulating even more dollar assets."
in The Times
Related: CurrencyShares British Pound Ster. Trst (NYSE:FXB), PowerShares DB US Dollar Index Bullish (NYSE:UUP), PowerShares DB US Dollar Index Bearish (NYSE:UDN)