We really can't know for sure what's going to happen.
I would have shares before, and the ability to buy on both sides of the event.
Save some dry powder for a possible spike down if we go over the cliff but don't be without shares in case we don't and it flies.
If an agreement isnt made by Jan. 1st it will be kinda off the cliff but more like kick the can again. A non event either way. These worms wont let the market crash and will do whats best for the World bankers.