iONiUM writes "In an interesting problem with physical currency, Iran is now running out of hard currency, due to a combination of inflation, and "Koenig & Bauer AG of Würzburg, Germany, also says it has not responded to an Iranian request for bids to make the presses to print new rials." Perhaps they should switch to BitCoin." Link to Original Source
A complex system that works is invariably found to have evolved from a
simple system that works.