How dollar became a reserve and global currency?

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A global currency is one that is accepted for trade throughout the world. Some of the world's currencies are accepted for most international transactions. The most popular are the U.S. dollar, the euro, and the yen. Another name for a global currency is the reserve currency.
According to the International Monetary Fund, the U.S. dollar is the most popular. As of the fourth quarter of 2019, it makes up over 60% of all known central bank foreign exchange reserves. That makes it the de facto global currency, even though it doesn't hold an official title.Dear viewers,this new episode discusses why is the dollar so powerful currency in detail.