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.
As of now the volume is low, what we need is more investors. We need more buyers. I think with the current price we should see more people buying /investing on Bitcoin. They should realize that with this price it is very cheap and sooner or later the price will recover and perhaps pass the all time high.