Again prediction markets, but you have to be interested to engage w/ prediction markets in the first place. Personally I think they can sometimes be fun to look at, but I have never felt the urge to engage and bet myself. But maybe this is just not meant for me :)

During breakfast I was still thinking about this. What if you would understand and built prediction markets not as betting perse but as a kind of voting. So it would not be a financial market so much, but more of a market of signals of preferences, like a more organic way of democracy. Much like you find democratic systems in nature w/ for example bees or ants. It would be interesting to built experiment at least.

Personally I think financial speculation as incentive would not interest me, but it could be a very interesting way to come to group decisions. (Especially for very large distributed groups.)