i am not thinking that price will reach 4000$ but i think i will reach atleast 2000$ . since no one can accurately say that what price will be but in my openion the price will be above of 2000$.
I see no reason for bitcoin to go upto $2k USD anytime soon as it has not yet reached $600. Even I don't know whether the bitcoin price will achieve the $1k level by December 2016.
Bitcoin is testing our patience since long time as its really taking long time to touch the $1k mark, and I think we still need to hold our nerves to see that price.
Even though some may sell there coins as of now but for sure many would see bitcoins price as of now as an opportunity to buy more. As you said bitcoin is just testing our patience since long time. $1k mark would be very hard since we are just stuck up at $500+ but as we expect it would gradually increase it price but the question is when?