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
We have seen over the past years BItcoin development has been very good, especially in 2017, but do you think that 2018 it will not be favorable? You can see in early 2018 it has started to silence not raise prices and even dropped. This is something that many people have to think about