Bitcoins price prediction is not consistent since a lot of things go into it before one can arrive at a good predicting rate. My price prediction of bitcoin trading at 18,000 by the end of the year is still yet to be fulfilled.
I do agree that price predictions is not really consistent because the market price is based on supply and demand so there will be no accurate prediction in the first place and what you really need is patience to wait for the market price to grow.