The plane slows down after it lands. Heading to passport control, one of the passengers stops at a vending machine to buy a bottle of soda — but the device is absolutely indifferent to all of their credit cards, cash, coins and everything else. All of that is part of a foreign economy as far as the machine is concerned, and as such, they can’t buy even a droplet of Coke.

The machine would be happy to accept a Mastercard (NYSE 🙂 or Visa (NYSE :). With a substantial markup, the airport’s cash exchange desk would have also been happy to assist. However, in blockchain, this scenario works well for some observers, provided we can swap travelling abroad and move assets from one chain.