Will all EU members have to adopt the euro?

Related questions

1. Is Poland an EU country?
2. Do new EU members have to adopt the euro?
3. Will Denmark adopt the euro?
4. Is Spain richer than Portugal?
5. Can I pay with euros in Poland?
6. What is the 2020 Lisbon Treaty?
7. Is Poland cheap to visit?
8. Do all EU countries have to adopt the euro by 2022?
9. Can you use euros in Poland 2019?
10. How much money should I bring to Poland?

Tags

1. #criteria
2. #except
3. #kingdom
4. #members
5. #denmark
6. #union
7. #states
8. #future
9. #their
10. #although
11. #continue
12. #european
13. #currencies
14. #united
15. #other
16. #obliged
17. #national
18. #adopt