Sovereign or Sovereignty is the full right of an entity to act as the governing body over itself. In political theory, sovereignty is a substantive term designating supreme legitimate authority over some polity. In international law, sovereignty is the exercise of power by a state.
As it related to cryptocurrency and blockchain technology, sovereignty is ultimate promise of digital assets such as Bitcoin. By owning the cryptographic keys that are associated with digital assets, the asset owners become their own banks. Where as in the case with fiat currency (government money such as USD/JPY/EURO/etc.) whenever a person has $1,000; they have $1,000 of AMERICA’s dollars; the case in Bitcoin is otherwise. If Person A owns 5BTC, then those are Person A’s 5BTC.