Despite the proliferation of payment apps, cash is used widely across the world, even in the United States. It's growing in 40 out of 42 countries, a Fed study says.

Bitcoin is also being driven higher by the hands-off approach many financial regulators seem to be taking toward the digital currency, Chapman said. Japan's government, for example, gave bitcoin ...

It's official: China's biggest tech company is now worth more than Facebook. Tencent (TCEHY) shares closed more than 2% higher in Hong Kong on Tuesday, valuing the social media and gaming giant at ...