I'm going to lose some of the non-geeks on this one. I've been playing with cryptocurrency lately. Bitcoin (BTC), Dogecoin (DOGE), etc. It's interesting technology. Essentially, it's a way to buy and sell things without a centrally owned repository (like the federal reserve, or Visa/Mastercard/etc.) In a nutshell, if I want to send you a bitcoin, there's no central authority who approves the transaction (just a consensus that the transaction was valid), so there's nobody who can stop me. It's the same advantage that gold has, but it can be done over the internet. It has one enormous downside, though: it's SLOW. Because of the way that these currencies are designed, it can take more than an hour for a transaction to go through and be finalized. (You can see that it has started after about 10 minutes, but it's not truly final for about an hour.) Some of them, like Litecoin, have developed ways to speed up the process, but it still takes 10-15 minut...
An American geek stumbling through Zürich culture.