There are this things called "Exchanges" in every airport in the world.
With the US dollar, Euro and some others, the world is your casino (following the comparison) and you can trade all of them. Same with gold and silver (although this are a bit harder to trade).
Hell, try to pay a taxi in Djibouti, Sao Paolo or Islamabad with a BTC or USD and see which they'll accept and which will get you kicked out.
With the US dollar, Euro and some others, the world is your casino (following the comparison) and you can trade all of them. Same with gold and silver (although this are a bit harder to trade).
Hell, try to pay a taxi in Djibouti, Sao Paolo or Islamabad with a BTC or USD and see which they'll accept and which will get you kicked out.