When you engage in cryptocurrency trading, you always deal with currency pairs. A currency pair consists of two currencies which an exchange allows its users to trade for each other. Here’s an example of a popular pair: ETH/BTC. With this pair you can buy and sell Ethereum for bitcoin.
The scale of financial transactions you can make on an exchange is determined by the number of currencies exchange offers and the number of trading pairs an exchange supports. If you are using bitcoin as your base currency on HitBTC, after depositing bitcoin into your account you will be able to engage in crypto to crypto trades for all the bitcoin currency pairs supported on HitBTC.