LONDON Bitcoin surged by as much as 7 percent on Tuesday and was on track for its longest winning streak in 18 months, as concerns that Greece could tumble out of the euro drove speculators and Greek depositors into the decentralized digital currency.
Prime Minister Alexis Tsipras lashed out at Greece’s creditors on Tuesday as he defied a string of warnings that Europe is preparing for a "Grexit". The debt-stricken country faces 1.6 billion euros […]
