My prediction is the bull market will come this year, at November. At the end of December, BTC price is $18k, ETH is $1k3, XRP $1.02. The bull market will continue at 3 first months of 2019.
Predicting can be made by any people that are engaged into crypto. Cryptocurrency experts' predictions are not also a guarantee to hit the target but whatever it is, i am really hoping that bitcoin will have a very good price hike this year.