Definitely dump if money is a concern to you when it comes to something like this. From a pure financial standpoint, you absolutely sell, but if you're interested in playing with and the $20-25 hit is something you don't mind, keep it. Personally, I have a difficult justify spending lots of money on cards, which is why I've turned Magic into a self-sustaining hobby. But others just want to save themselves some money while still paying out when playing.
Bottom line – It's up to you. If you want the most money, sell now. If you need/want it to play with and don't mind the loss, keep it.
If i wanted to play devil's advocate (which i love to do) I'd say the comparison between innistrad and worldwake isn't enough to squash her as not being jace worthy. People are cracking packs like crazy, but part of that is Magic is simply blowing up right now. Pre-releases were off the charts, and i personally know lots of casual players that are trying to build competetive type 2 decks and get more involved with magic. So its certainly possible there's just a rise in the amount of players who want type 2 stuff.
/devil
I'm not suggesting this is the case, but possible.
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