I dont know till when bitcoin will be able to stand above 1000 dollars, knowing the split is about to happen and it will damage bitcoin, soo i would spend some of my coins or exchange them into fiat and wait the changes to happen, and then to invest over bitcoin again.
No one knows for sure whether there will be a split or not. Therefore, everyone uses bitcoin regardless of this.
Anyone who has such an opportunity. I know that in many countries people can not buy goods for bitcoins, so they just keep it