Outside of migrants, Soros said financially strapped Greece, which is supported by a European bailout worth billions of euros, remains another problem for the eurozone, and that the country will never flourish or be an investible region until it leaves the currency union. He also said the European Union will be much weaker if Britain votes to leave. (The U.K. is not part of the eurozone.) British Prime Minister David Cameron has promised a national vote on the issue by the end of 2017.