Why did the ruler of Spain finance the expedition of the conquistador?

The ruler of Spain, King Ferdinand, financed the expedition of the conquistador, primarily to expand Spanish territory and influence in the New World, as well as to increase wealth through the acquisition of gold and silver. Additionally, the expedition was seen as a way to spread Christianity and counter the influence of rival European powers. By supporting such ventures, Ferdinand aimed to enhance Spain's prestige and secure its position as a leading global power.