Since the start of the year, the ruble has soared 40% against the dollar — outperforming every other currency in the world.Russian President Vladimir Putin has touted the ruble’s robust recovery as proof that his economy has successfully withstood the onslaught of Western sanctions. “The idea was clear: crush the Russian economy violently,” Putin told an economic forum in St. Petersburg last week. “They did not succeed. Obviously, that didn’t happen.”