
It's on 9.9 and it's asking for an update.
I use Sky3DS. Should I wait?
If you don't need the eShop, then wait, just on the slim chance 10 patched something. If you do, upgrade. There's no explicit indication of an exploit coming.
I would hold off until somebody confirms that either nothing will be released that can run CFW on 9.9 or that 10.1 (What you will be updating to) can be exploited.
this is what I am going to do, as I have all the time in the world to wait.