Wirex opened for business in the U.K. in 2014, offering the first platform capable of buying and selling cryptocurrency and converting that digital money to fiat currency (British pounds, euros, and U.S. dollars) for use in stores through a Visa debit card. That contactless Visa card, which is issued by Contis (also the account processor), is carried by more than 100,000 cardholders in Europe. All cards have international bank account numbers and bank identifier codes. Cardholders can buy and sell Bitcoin, XRP, Ethereum, and Litecoin cryptocurrencies. And they can load pounds, euros, or dol...