if there is a hardfork on bitcoin by 2018, I predict that bitcoin prices will reach over $ 10,000 by the end of 2018. well, that's actually still quite a while. but, I think the bitcoin price will be really high at that point.
Well let's just see if there would be another fork scheduled by that year since There are so many fork happening on this year and might we cannot see any major fork happen for the year 2018. But let's not focus on the fork since the one I love to see here is the adoption and if the supporters of btc will grow well that one could contribute really and we can able to see that the price go hard for even 20,000$ each.
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bitcoins value these days are now 7000$ dollars but were all expecting that it would fall after the fork, i think the price can drop until 4000$ to 4500$ but will be recovered again back to 6000$ going to 7500$ after a few days and if the rumored december fork is true , then ill be expecting that it can jump up to 8500$ going to 10000$ until the end of the year. this is only based on my own predictions.
For now Price of bitcoins is going excellent and continuously grows up but I don't see any major fall happen to it since people will surely want to hold still there btc balances and although there's a dump will come but it will be a little bit and it cannot hurt the feelings of the holders.