Nobody knows and guarantees that 2018 is better than 2017, as we know that there is currently so much negative news about bitcoin that it makes a lot of users trust the false news and choose cut lose.
Yes i also think that no one know in advance that what is going to happen to bitcoin, to me my personal view is that bitcoin will remain as for ever and in future its price will increase too much, and that is only because of the increasing interest of the people in bitcoin, i think that the interest of the people in bitcoin will continue increasing for a long long time.