Here's another interesting hypothesis (I just can't remember where I read it, so some tongue in cheeck in order). This may get the Armageddonists and Conspiracy fringe sweating. The problem with a real world currency is... is it really that valuable? Global airlines use what is called a NUX or Neutral Unit of X-change. Cross-rates cause them endless problems so when they calculate fares they enter the actual payment currency value, which in the system is always converted and stored in NUX, but on the screen, ticket, wherever, is always shown in the relevant currency. This includes the USD. Doesn't matter whether you're paying in ZAR for a ZAR trip or ZAR for a USD trip or whatever, the value is stored in NUX with associated cross-rate. This apparently makes backend accounting much easier to manage due to the legions of taxes and airport charges etc involved. It also enables them to generate much more relevant stats since they now have a static "currency" they can use to measure metrics across realworld currencies on a level playing field. The point is, why not have a global digital NUX that is used to measure the NUX value of all currencies? Decouple from the USD as a physical currency and "purchase" digital NUX. The store of value then is not physical but the actual real world perceived value of a currency relative to other currencies. So for example a productive country's currency would have a NUX value of 10 while the Zim dollar would be 0.000000000000000001, and voila, you have measure and store of value that is not distorted. The important thing to make this work would be to keep the NUX as a digital measure of value which is bankable. It may never become a paper currency in it's own right. Yes, I know it merely replaces one reserve with another but the point is that it is globally neutral (does not belong to any one country) and can thus not be abused as a reserve currency such as is happening right now with the USD