$BTC
$ETH Here is a short and simple overview of the US Dollar ($) in English:
The US Dollar (USD)
Global Currency: The US Dollar is the most powerful and widely used currency in the world. It is often called the "World's Reserve Currency."
Symbol & Units: Its symbol is $. One dollar is divided into 100 cents.
Safe Haven: Investors often buy dollars during global economic trouble because it is considered very stable and safe.
Global Trade: Most international products, like Oil and Gold, are priced and traded in US Dollars.
The Fed: It is controlled and issued by the Federal Reserve (the central bank of the United States).
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