Ten years after Mario Draghi pledged to do 'whatever it takes' the save the euro, former European Central Bank President Jean-Claude Trichet says the single currency's existence is no longer in question. He tells Bloomberg's Stephen Carroll that successive bond-buying programs put in place by the ECB, dating back to his leadership, have helped convince markets it can handle crises, including the current inflation spiral.Anchor, Bloomberg RadioSee omnystudio.com/listener for privacy information.