World currency, in the context of the global economy, refers to a medium of exchange that is recognized and used internationally. The history of currency begins in ancient times, when people first used items such as shells, salt and precious metals as a medium of exchange. This process continued until the advent of coins in the seventh century BC, which made transactions easier and provided more stable value. In the 17th century, the paper money system emerged, which allowed more efficient trade. Banks began issuing banknotes that could be exchanged for precious metals, providing convenience and flexibility. In this period, Britain emerged as a global economic power, displacing the Pound Sterling as Europe’s favorite currency. The industrial revolution in the 18th to 19th centuries further strengthened the position of world currencies. Countries such as the United States began to develop their own banking systems and official currencies. In 1944, the Bretton Woods Conference produced a system that tied national currencies to the US dollar, financed by gold reserves. This makes the dollar the world’s reserve currency. However, in the early 1970s, the Bretton Woods system collapsed and a floating exchange rate strategy was introduced. As a result, the value of the dollar and other currencies begins to fluctuate based on supply and demand in the market. Rapid globalization gave rise to the forex market, where currency trading takes place 24 hours a day, with high liquidity and volatility that attracts the attention of investors. Currently, three major currencies dominate world markets: the US dollar, the euro and the Japanese yen. The US dollar remains the main reserve currency, supplying about 60% of global foreign exchange reserves. The euro, introduced in 1999, became a powerful alternative, making the European region an integrated economic zone. The Japanese Yen, although smaller, also plays an important role as a stable currency. Digitalization and technological innovation continues, changing the world’s currency landscape. The emergence of cryptocurrencies like Bitcoin in 2009 represented a paradigm shift in the way people view money. These digital currencies offer faster transactions and lower fees, although they face challenges such as regulation and price volatility. Furthermore, the adoption of blockchain technology promises transparency and efficiency in global transactions. Many central banks are starting to consider issuing their own digital currencies (CBDCs) to increase control over the monetary system. This will have a significant impact on traditional banking systems and payment methods. In the competition between countries and companies, control over currencies and payment systems is key. Threats to the dominance of the US dollar, especially from China developing the international renminbi, show that the history of world currencies is not over. Over time, we will see the evolution of increasingly complex world currencies, fueled by technological innovation and unpredictable geopolitical dynamics. World currencies continue to experience dynamic development, influenced by economic, political and technological factors. With ongoing investment and innovation, it is important to monitor any changes that could impact the stability and use of currencies around the world.