Yes thats true this year is the hardest part of bitcoin this more on dropping than rising because this year a lot of issue regarding big exchange being hack by the hackers so manny investors are afraid of investing,not only that theres also manipulatoin of five exchange coinbase and bitstamp and there are three more i forgot those three.
If this hardest part of bitcoin will continue till the year end then it is not a crucial year but a bearish year and this happen after bullish year of 2017. This might be an accumulation time for bitcoin where it will have more price dips or corrections for the whole year. There is no doubt that manipulation and hacking can affect the price of the bitcoin but there is also time when bitcoin remain bearish for a long time before starting to go bullish again.