As bitcoin has emerged from the underground world of nerds and criminals to become a mainstream investment, the risk of hacks and scandals has also blossomed. What's a government to do? The WSJ's Steven Russolillo travels the world (sort of) to see how regulators are responding to the remarkable rise of cryptocurrencies. Video: Sharon Shi and Crystal Tai

Source: Wall Street Journal January 29, 2018 05:40 UTC