What is the most widely used currency in the world?

The most widely used currency in the world is the United States dollar (USD). The U.S. dollar is the global reserve currency, meaning it is held by central banks and used in international trade. It is widely accepted as a means of payment in many countries, even those outside of the United States. The dollar’s dominance in global finance is bolstered by its stability, liquidity, and the size of the U.S. economy. It is also the standard currency for commodities such as oil and gold, which are traded globally.