Back in the 19th Century until 1914 we had a world currency, gold, and it worked as well as any system could be expected to work, fostering international trade and prosperity. It was destroyed not because it didn't work, but because it did, enforcing discipline and honesty, and in 1914 the governments of Europe, particularly the British government, didn't want discipline and honesty, they wanted war, and not just a little war, the biggest war there'd ever been, and they didn't have the money to pay for it, and slaughtering the best part of a generation of men is quite expensive. So, what do you do when you don't have money but you need money? If you're a government, you steal it, and that's what they did, by destroying the Gold Standard, and we're still living with the consequences.
The choice we face today is the same as the choice the world faced in 1914: a world of peace, prosperity and freedom, or a world of war, totalitarian states and slavery. If we act like sheep, we will end like sheep.