The Dollar has been very weak in the past 8 years. Against the Euro, the Dollar has fallen by over 30% since 2001. The Dollar has also fallen against the Yen and other currencies. This means that countries holding reserves in dollars are seeing a decline in their value. For example, China has over $1,400 billion of dollar reserves. A 20% devaluation represents a significant loss for them. Therefore, the rational step is to diversify out of the dollar.