Second, Columbus wanted to find gold. Gold was the main kind of money used in Columbus's times. In his letter to Spain's King Ferdinand and Queen Isabella, Columbus wrote: “Gold is most excellent; gold is treasure, and [the person] who [has] it does all he wishes to in this world." This means that someone with gold can do anything he wants to do. Many historians believe that Columbus wanted to become a powerful person and in order to become powerful, he needed to find gold.