I don't think it's worth 0 -- The dn has a lot of possibilities:
It could be developed into a Stock eXchange - Update site where visitors can choose their favorite stock tickers for updates, etc.
You can monetize it now by parking and using the keywords "stock" which has 285K+ searches a month or "stock investing" which has 324K+ searches a month.
As everyone says, no one knows where the *.mobi will go, yet there is no reason you can't make money with it now, right?