"To choose a currency" means to select a specific type of money to use for buying and selling things.
Sentences with «to choose a currency»
Choose the currency pair, number of lots, type of order, and customize the order type to help limit losses and protect profits. (forex-trading-software.com)
The first thing to do is choose the currency exchange you wish to work with. (wirexapp.com)
After you have chosen currency pair to trade, the trading screen opens up. (captainaltcoin.com)