Of course later, once EDIS is in place, a single deposit insurance fund would be of interest to CEE countries to offer deposit guarantee also through their national schemes, supported by a common pot. As you understand, this is a strong incentive to join the euro ultimately.
4  Table 2 Deposit Guarantee Schemes in the EU and the US (EU 2012 figures in euro, US 2014 figures in US dollars)  Source: European Commission, “Towards a European Deposit Insurance Scheme”, 9 November 2015. EDIS requires only € billion on behalf of Germany to create the common pot of € billion, a country that is dragging its feet on the issue.