Yes, cryptocurrencies are a medium of exchange, which can be used to make payments for online purchases. There are hundreds of online shops and retailers that accept Bitcoin and other cryptocurrencies. However, there is a catch. Both the buyer and seller should agree to accept the particular cryptocurrency for the deal. There are various search engines to find the goods and services that can be purchased using cryptocurrencies.
Some experts have already expressed concern that the inclusion of the Binance Coin on the platform may prove controversial in the United States. While Binance.US is described as a subsidiary, its business model might draw attention from the U.S. Securities and Exchange Commission based on the fact that BNB token acts as both a security and a utility token. As such, it could pass the so-called Howey test for being security, thus potentially becoming a snag on the Binance’s path to establishing itself in the US.

The exchange is cutting off Chinese users and will lose a third of revenues from next year, co-founder tells FT News
Spot trading means you’re not technically “buying” the cryptocurrency, but instead trading your USD for it through either a market or a limit order. A market order means you agree to trade for the currency at the current market price. A limit order lets you put in a designated price at which you want the trade to occur, and when the currency reaches that price, the trade happens automatically. These orders then incur “maker” (for limit orders) or “taker” (for market orders) fees — though on Binance.US, there’s just a standard 0.1% fee.