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We will see :-).
It all depends on the people reactions after the split. What masses will choose will influence for sure what will happen, at least for the first week.

If transactions will be adopted on exchanges, then will be a unknown road again for BTC. Only time will tell... now being in 1 day diff till split.

Regarding altcoins, i was looking on charts in the last two days, for my choosed ones and i saw small ups and downs... could trade them to play a little, but i felt not to do that :-). Maybe i could do small trades and buy back BTC... i will see :-)