Price of bitcoin increased because in 2017 many people get involved with it.
And old bitcoin users make HUGE profit, and new users Get scared.
What we need now, People need little study about what they wants to do.
this is just an orientation on the use of bitcoin,most do not want to know about it and the one that has gotten the information kept it off from others, i think it is high time everyone get the knowledge so as to invest and get profit too.