The exchange rate of a currency is primarily determined by market forces, specifically the demand for and supply of that currency. High demand for a country's goods and services, which requires its currency, will increase its value. Similarly, political and economic stability fosters confidence, attracting foreign investment and bolstering the currency's strength. The World Bank's role is in development finance, not direct currency pricing. While economic potential influences demand, it's the actual demand for goods/services and confidence from stability that directly impact pricing.