Switzerland’s success shows that a nation can revalue its way to prosperity, says Ruchir Sharma for the Financial Times. NEW YORK: Amid all the talk about whether the US is keen to devalue the mighty dollar as one way to revive American manufacturing, it is worth noting that the dollar is not the world’s strongest currency and has not been for decades. That title goes to the Swiss franc , and the mighty franc has done nothing to undermine Switzerland’s competitiveness. The world’s richest major