I was on Kerry Lutz's show and we discussed, among other things, the Cryptocurrency market and how it's eerily similar to the Dotcom bubble.

None of them make money (because, they're well...currencies)
"New technologies" and fancy tech talk are the reasons they have value.
If you don't understand it, don't worry, I guess it's just over your head.

Oh yeah.   I almost forgot.

There's also 970 of them.