[pintxo]

Interestingly money (or control thereof) is not named as one of the fundamental properties of a state [1]. So maybe having an independent currency won't help you much, as long as the state you currently live in holds the monopoly on legitimate use of force (for an example see [2]).

[1] https://en.wikipedia.org/wiki/State_(polity) The most commonly used definition is Max Weber's, which describes the state as a compulsory political organization with a centralized government that maintains a monopoly of the legitimate use of force within a certain territory. General categories of state institutions include administrative bureaucracies, legal systems, and military or religious organizations.

[2] https://en.wikipedia.org/wiki/Inner_German_border