While a settlement on the moon will undoubtedly require significant help and support from Earth to become self-sufficient, there is no reason to believe that a colony not only capable of sustaining itself, but also contributing to the “Earth-Moon system economy,” which can be considered the natural evolution of the current “global economy,” is impossible. Crawford published an in-depth review of Earth’s natural satellite’s resources in 2014, including water and its precursors, metals, rare Earth elements, and Helium-3. Such resources are required for habitability and can be used effectively to sustain the settlement. Their application can also be used to develop a lunar industrial system, which is essential for all future human activity in the solar system. If it is economically feasible, rare elements such as Helium-3 could be brought back to Earth.