It is not impossible I think and Bitcoin will go up $60,000 by 2018. But I think for rising this huge amount of dollar a larger number of amount will be needed. And for this reason it will be very costly to buy Bitcoins.
Possialities i always there. We cannot say that it is impossible. According to my point of view it is very much possible but not so easy to happen. I think that bitcoin price has the ability and potential to reach to that price, but i think that it will take a little more time. I think that bitcoin price is even expected to cross 100000$ but when more and more people get knowledge about bitcoin and invest their money in bitcoin.