I have strong optimism for bitcoin hit unprecedented value before ending of 2018
I agree with you, the only certain thing is the price will not get stuck, it will rise or dump, but never get stuck. And yeah, I believe it will give us some surprises this 2018, just because this year is the world cup, and not sure why or how, but i'm sure that affects the bitcoin price.
But we can spect bigger surprises in other alts this year, not only in bitcoin, so i recommend to follow all altcoins markets, and if you can join with small amounts to all of them, then you will get a nice profit for sure.
We must be very confident about the future for us to become more finacially free. There is no certain things in this kind of market but you have to believe and be optimist that every coins will go up higher specially with bitcoin. The best price is yet to happen so keep on investing on a great coin.