* The Scottish economy is about 50x larger than Montenegro, so "fairly small" is relative. Similar-sized Denmark, Sweden and Norway have their own currency, let

* The Scottish economy is about 50x larger than Montenegro, so "fairly small" is relative. Similar-sized Denmark, Sweden and Norway have their own currency, let alone tiny Iceland. * The EU and ECB aren't particularly happy that Montenegro is using the Euro without being a member anyway...(see your wiki link)