Many fear a rise in prices during the switch, as had occurred in other countries that joined over the past decade.

Bulgaria has the green light to join the euro next year and become the 21st member of the European Union's currency union.

Bulgaria will join the Eurozone next year. The European Commission granted the eastern European country the green light yesterday. Bulgaria is now the 21st member to join the single currency bloc, but it did not come without a bit of drama along the way.