2017 was 4th best year for Bitcoin after 2010, 2013 and 2011.   You see all beside year 2014 were positive.

2010 $0.003  +10000%
2011 $0.3        +1566%
2012 $5            +160%
2013 $13         +5823%
2014 $770           -59%
2015 $316          +36%
2016 $430        +128%
2017 $980      +1286%
2018 $13585