Digital currency is inching its way onto Wall Street, with a new "bitcoin center" next door to the New York Stock Exchange. As bitcoin gains prominence and popularity, regulators — like New York's Department of Financial Services, which is holding hearings next week — are trying to work out where they figure in this new currency. Joe Nocera of the New York Times talks about the future of bitcoin while Rana Foroohar of Time magazine reports from the World Economic Forum in Davos, Switzerland. 

And if you still can't get enough of bitcoin, here's some more.