I'm not really expecting that a bull will commence for this year. We may see more squeeze and dips but by 2020, I'm putting a bigger hope that it will be the year that bitcoin will increase like crazy.
I don't really expect that this year's bitcoin will pump sharply and accelerate to high prices, because doing so will take a long time, maybe in 2020 it can happen.
Yes, as mentioned there will be bitcoin halving by 2020. About one more year to go.
https://www.bitcoinblockhalf.com/