Ok I'll start but I'm not as experienced as some on this forum. If it is approved I think the price will start rising within an hour of the news being announced. I think It will spike in 24 hours, more than doubling in value. As the ETF becomes active and demand rises, I think prices will triple again, maybe even spiking to the 10k-15k range, it will drop off to the 6-7k range and remain stable. It will climb over 10k stable by the end of the year.
If it is denied, I think the selloff of the ETF speculators will cause it to crash to the 600-700 range. When the Chinese markets open again days later, it will fall below 500. It will sharply rise after bottoming out two weeks later. People like us will take advantage of the low prices and buy like crazy. Slowly rising to 1100 range by early April and slowly climbing to 2k stable by the end of 2017.
Remember, not that experienced, just looked at a lot of historical bitcoin charts.
IMO it can't be worse than the PBOC stuff that went down months ago. If denied it'll probably drop to ~900 but not lower than that