After nearly two years of inertia, bitcoin hits $100 for the first time on April Fools’ Day and then booms — doubling to more than $200 apiece in the span of a week. The catalyst is the Cyprus banking crisis and, specifically, President Nicos Anastasiades’s proposal to tax every single bank account in the country. Panicked Cypriots take to Bitcoin en masse, driving up its price and publicity.