Something less known for people from the West. In 90's when USSR just got collapsed we used Turbo chewing gum auto images as money substitute among children (see images in the blog post below). Parents were poor so an ability to buy chewing gum was strictly limited. Different cars on the images were valued differently (collectibles). We gambled them, we exchanged them, we collect them.
Just realized that this is the case of spontaneous creation of medium of exchange isn't that amazing?
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