For me, it’s not surprised . You know , In bitcoin investment ,we can’t predict anything previously and exactly. And sometimes you can get lucky from it. Bitcoin is increasing very fast in 2017 because of the spread of bitcoin to many people who saw great technology of bitcoin and its usefulness in the future.I think Nothing can control bitcoin up and down because bitcoin market cap is too large (over 200 billions dollars). If you want to control bitcoin up or down you need have billions dollars.