The great majority of conspiracy theories are untrue because human beings are grossly incompetent as individuals and even more so as groups, teams, and companies. They are incapable of planning, organizing, and accomplishing the things conspiracy theorists accuse them of.
However, given the nature of global control, and adjusting for Bible prophecy, there are drastic measures in the works for a one world currency system. So I would not readily dismiss theories out of hand as conspiricies.