I live in a non-EUR EU member (Romania) and I keep hearing for several years about the aim for EUR adoption. Technically, there are several criteria (EUR convergence criteria) that must be met in order to be able to adopt the European currency.
According to this Wikipedia article Romania has more than 10 years of discussions about EUR adoption, with many delays of target adoption year (currently it is 2022).
the foreign minister of Romania has declared on the 28th of August 2017 that, as they "meet all formal requirements", Romania "could join the currency union even tomorrow". However, he thinks Romania "will adopt the euro in five years, in 2022"
Also, this answer illustrates numerous disadvantages generated by having a global currency - e.g.:
- trade deficit
- bad policies in one area get exported to other areas
- countries can't devalue their currencies so as to increase employment
Question: considering above arguments, why is it so important for a non-EUR country to adopt the European currency? There are clearly some advantages (e.g. easier trade), but there are also numerous disadvantages.