Global Regulators Play Bitcoin Whack-a-Mole as Demand Explodes Evading government control a central feature of bitcoin Efforts to regulate digital currencies stymie authorities Banks Respond to Growing Interest in Cryptocurrencies Regulators worldwide are finding that it’s incredibly hard to control the explosive growth of money tied to no nation. Russian President Vladimir Putin is the latest to call for regulation of cryptocurrencies, saying there are “serious risks” they can be used for money laundering or tax evasion. Finance Minister Anton…