1. Visa (17,559m USD average daily transaction volume) / 2. MasterCard (9,863m USD) / 3. China Union Pay (7,562m USD) / 4. American Express (2,434m) / 5. Discover (438m) / Source: Coinometrics
If you were a wannabe hacker, here's how you'd use bitcoin to hold internet users to ransom. But be warned: You'd probably get caught - especially if you made mistakes like the WannaCry hackers.
The town of Zug in Switzerland wants to become the center of a Swiss "Crypto Valley." Residents can now pay their fees in Bitcoin, and Fintech companies in the region are closely watching this experiment.
The German government's plan to limit cash payments to a maximum of 5,000 euros has triggered a heated debate about the pros and cons of cash. DW's Zhang Danhong is not convinced by arguments against paper money.
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