Code is at https://github.com/thedawnrider/bitcoinalafuture for anyone interested.

This site was stable and secure when set up correctly.

It never gained traction because it was
- not marketed at all
- had crap css style
- has questionable value to users

The problem with it is
- what incentive is there to make a prediction, rather than oppose someone else? Needs a way for creating information to be more valuable than consuming it.
- big players who can manipulate the market are better able to use this to strengthen their position, facilitating a concentration of wealth (my biggest issue personally with the idea).
- there are a lot more interesting things to do in the bitcoin economy than predicting the future price.
- the site needs some casino-style flashing lights to add to the entertainment value (which I consider to be the primary value).
- it has no charting (which would make the site potentially a useful sentiment indicator).
- it requires human input to move coins out to winners (something to bear in mind is this platform currently requires daily attention by the operator).