U.K. Prime Minister David Cameron And Hungary's Prime Minister Viktor Orban News Conference [Getty Images]

Viktor Orban, Hungary's prime minister, gestures during a joint news conference with David Cameron, U.K. prime minister, in Budapest, Hungary, on Thursday, Jan. 7, 2016. On the euro, Cameron said that while Britain wants the shared currency to be a success, he wants to ensure "that we're not called upon to support the euro zone financially.". Photographer: Balazs Mohai/Bloomberg via Getty Images

Bloomberg Bloomberg