I think that bitcoin will cost around $ 100 000 and this is based on the analysis of the price and development of the industry on the basis of the schedule for the entire period !
To reach $ 100,000 in 3 years certainly cannot happen in a month, there must be a long process and of course it can be achieved gradually, to reach $ 100,000 the final price of 2018 must reach $ 25,000, if the end of the year price is under $ 10,0000 it seems difficult reach $ 100,000 in 3 years.