Why the euro should not be used in the world?

The euro should not be used globally because its adoption could undermine national sovereignty, as countries would lose control over their monetary policies and exchange rates, which are crucial for addressing local economic conditions. Furthermore, the eurozone faces significant economic disparities among member states, leading to potential instability if the euro were to be used more widely. Additionally, the euro's fluctuating value can create challenges for trade and investment outside of Europe, making it less appealing as a global currency compared to more stable alternatives like the US dollar.