They aren't perfectly secured. They seem secure for two reasons: Try to hack a bank, or exploit credit cards, or even break in a vault, and you'll see what kin

They aren't perfectly secured. They seem secure for two reasons: Try to hack a bank, or exploit credit cards, or even break in a vault, and you'll see what kind of external measures governments and private agencies put into protecting the system (hint: you'll get locked forever, or shot, or worse) Now imagine you succeed, and somehow don't leave any exploitable trail, do you think a story will pop somewhere? I don't. Centralized money systems are the reason today, what you make in a month working 16 hours a day in some country will buy you a drink in another. This allows rich countries to straight up buyout any poor country's production, and for trivial amounts. It leaves them in a state where people are starving, even though they produce enough to feed 10x their population. Imagine a world where a bag of rice costs the same in every country. Yeah, currencies are awesome. Edit: just to be clear, I'm not saying rich countries are evil(er), because this would not work without the cooperation of poor countries leadership.