Bitcoin is not bound by geographical borders, any device that manages a full node or connects to a full node and generates addresses from private keys can use bitcoin, you do not need a specific passport or to be from a specific country or prohibited to certain countries.
Whenever there is a demand and a person is willing to pay for it, this is the beginning of a small market for these currencies. This market can be Bitcoin in exchange for a service, in exchange for work, in exchange for gifts, other currencies, metals, gold, etc.