Every nation has its own currency that can be exchanged for goods and services, but relying on such monetary systems has its problems. In international trade, the use of national currencies may give certain
countries an unfair advantage, allowing them to manipulate the value of their national currency to serve
their own ends. On a local level, national currency may not adequately support commercial flow within
communities. While some see the use of national currencies as a necessity of commerce, others are
exploring the use of alternative global and local currencies for a variety of purposes.