$17,000 isn't the peak of bitcoin obviously as we have seen it achieved over $20,000 weeks ago before got corrected to $11K.
Despite all the bad or good news which cause lots of fluctuation, bitcoin could recover to $15,340 right now, isn't it impressive?
People are free to invest in bitcoin, even buy at $17K isn't something fools, bitcoin will continue to reach higher price over time, even some people predicted it may reach over $100K by the end of 2018.