Not all sovereign countries can maintain their currency exchange rates like China and the United States, and not all sovereign countries hope to accept the world economic order dominated by powerful countries such as China and the United States. In contrast, El Salvador uses Bitcoin's cryptocurrency with a clear algorithmic economic model as its legal currency, which is a good choice. Therefore, it can be expected that in the future, more and more countries or regions with similar economic conditions as El Salvador will use Bitcoin as legal currency.