Re: one world currency, they don’t have to make a single world currency that everyone uses, they just have to make one that all the banks use. What they will push for is a unified trading currency for the banks. Then the World Bank/IMF/BIS will set the exchange rates of each nation’s currency to this unified trading currency. You will still get to spend your dollars or euros or rand or whatever. You can still feel patriotic seeing old George Washington’s face on the $1 bill, as well as get creeped out by the pyramid and all-seeing eye on the back. It’s just that the value of the dollar/rand/remnibi/etc… will not be determined by anyone in your country but rather by faceless bureaucrats and bankers.
Heck it is very close to working this way now, it’s just that the US$ is the unified trading currency.