US Dollar is the official currency of the United States.
The US Dollar (USD) is the official currency of the United States and is one of the most widely used currencies around the world. In the context of cryptocurrency, the US Dollar often serves as a benchmark for cryptocurrency prices, and many cryptocurrencies are traded against USD. Additionally, many stablecoins, which are cryptocurrencies designed to minimize volatility, are pegged to the US Dollar.
The price of Bitcoin is often quoted in US dollars. For instance, if 1 BTC equals $40,000, it means you would need $40,000 to buy 1 Bitcoin.