Year 2017 was the best year for bitcoin so far as it crossed $21k last year but later on we saw major downfall in the price of bitcoins as people felt that it will fall very badly and they started to sell their coins which affected the price very badly and in this year price will increase slowly and steadily but we cannot expect that it will achieve $20k price once again in this year and if it achieves then it will be a win win for all the investors and only time will show the exact picture.