The price 3500$ can happen this coming days and still increasing as the year nearly ends.
It's slipped down below $3500 just now. I expect there will be some profit taking before it makes it's next leg up.
Some exchanges already hit $3,500 though, what i'm curious next is the price of bitcoin will continue increase, going down or stable on this price. I hope the price can stable for the next week and if it increase i'm happy with that too. Actually the bitcoin cash price also increasing too today.
Bitcoin price crossed 3500$ already, now we are expecting price of one bitcoin in 2018 is 5k$. And I am pretty sure that price will go up and reach that milestone.