It looks like there will be a split with bitcoin on the 1st but it is not as dire as it seems. The vast majority are still behind segwit. But there is a small section that will try to split the coin and make bitcoin cash. How this works, as far as I know it, if the split happens you will get both bitcoin and bitcoin cash for your bitcoin. You can check the futures price of bitcoin cash (I will link it) but odds are it will drop fast as a lot of people will sell it to get more bitcoin or another coin of their choice. But maybe bitcoin cash will hold as its own coin, or maybe nobody will mine it and this will be for not.
If you are wondering what bitcoin cash is it is bitcoin with the limit raised to 8 mb blocks. To be honest I do not exactly knows what that means but it will help with transaction cost (and maybe speed) and will make it work more as cash (hence the name bitcoin cash). For something to work as cash you need to handle a LOT of transactions. I'm sure there are people who want bitcoin to be more like a cash than a security (gold) so this might have some weight to it.
Here is a link with more info:
https://news.bitcoin.com/what-every-bitcoiner-should-know-about-bitcoin-cash/
And here is a link to the futures price of bitcoin price:
https://coinmarketcap.com/currencies/bitcoin-cash/
*my upvotes/rep disclaimer: https://steemit.com/steemit/@whatageek/my-steemit-account-where-i-stand-on-bots-self-votes-and-multiple-account