My "real reason" wasn't an option in the poll, but I voted the drugs thing. The article on Wired about Silk Road introduced me to the idea of it, then I looked it up in more detail myself. I liked the idea of a virtual currency that you can access anywhere and is given instantly to the other person, and I REALLY liked that there is no governing body for it.

But my real reason? Mining.

I have a powerful-ish PC, so if I keep it going for a month or so, I get about £20. Free cash, baby.