Bitcoin is a kind of digital currency, which means it doesn't exist as banknotes. At first, bitcoin was only made for collectors. ①__________ You can store it in an online "wallet". And with that wallet, you can spend bitcoin online and in the physical world buying goods and services. More and more businesses,restaurants and universities accept payment by bitcoin. And, of course, bitcoin has a valuation, which you may have heard aboul because bitcoin's price has Jluctuated up and down.

What's different about bitcoin?

②__________ That card is connected to information about you, such as your name and address. You can use bitcoin in the same way, but unlike with a credit card, the transactions you make with the currency are completely anonymous(匿名的). They can't be used to identify you personally. ③__________ Is that why the WannaCry attackers picked it as a form of payment?

④__________

The bitcoin currency is unique-no authority can change the value. It's quick and easy to set up a bitcoin account. It's fast-it only takes a few minutes to transfer your payments. ⑤__________

Possibly, bitcoin has certainly gained prominence in the news media as a technology that can facilitate crime. But even though the identities of people in a bitcoin trade may be hidden, the public ledger has increasingly helped law trace the movement of bitcoin from place to place.

A. What makes the bitcoin currency unique?

B. Another way of exchanging bitcoin is at ATMs.

C. So you can use bitcoin to protect your privacy.

D. It's cheap-trade fees are usually zero, or less than cent 1.

E. Usually, if you pay for something on the Internet, you use a credit or debit card.

F. However, you can buy it with dollars or euros, just like you can trade any other currency.