I predict EU will be dissolved or at least not in the same form as today within 5 years for the following reasons:
Most EU countries do not welcome refugees / immigrants esp. from Middle East. They
have too many bad experiences. I'm sorry about the Syrian refugees. Most
complain they have lose their own national characters.
2. A common currency is only good for tourists and some small countries would enjoy it. If we let Greece to depreciate its own currency, they would recover faster.
3. It allows countries to cheat easily.
Many EU elections will be in this year. See what will happen.