
Spanish currency may have the highest value of any in the world - if you're going for the street value. A recent study found that traces of cocaine can be
found on 94% of all of the banknotes in Spain. The percentage is estimated to be the highest in the world, reflective of the fact that Spain has the highest rate of cocaine users in the world and that prices have been falling. Researchers at the lab responsible for the tests say that it is possible that some of the traces resulted when the bills can in contact with other bills during normal transactions, and not necessarily because they were used to snort cocaine.