If I live in my country I need my physical goods to be my country with me. If my country becomes unbearably controlling they can restrict imports so that I can only buy and import foreign goods if I can prove I paid for them in my country's official country earned in the official economy.
The existence of other countries does give me the option of emigrating from my country if there is a less controlling country that will allow me in.
The existence of other countries does give me the option of emigrating from my country if there is a less controlling country that will allow me in.