Last week I ran a poetry contest. The entries came from all over the world (I can only assume, I did not actually ask where anybody was from). At the end of the contest I was able to send a little bit of money to about ten different people I had never met before and all I had to identify them was a single string of characters, the money was sent instantly for an a "generous" fee of the equivalent of 0.1 USD. You don't see how bitcoins are useful? Maybe I could have sent them cash in the mail ... 0.41 usd each for the postage, but wait I don't have addresses for them, I could ask for their mailing address, but no, they would not want to give me (an anonymous guy on the internet) that information, so my giveaway would have failed.