I predict an ATH to be broken in 2019 or 2020 and from that there's only one way: up. Usually after establishing a new ATH Bitcoin is facing an exponential pump. A 300% gain would be nothing special at that point, so 60,000 dollars before 2021 would be my guess. If it happens there will be another year long bear market and everything will repeat.
That's something we can't predict as market keeps on movings highs and lows, it's very volatile, uncertain, and uncontrollable. However, I believe that it will continue its dominance and its demand will continue to increase and expand. Bitcoin has been into this major correction before, that's how it works, that's its real nature, but it's also designed to survive. It takes patience, hope, and positivity inorder to succeed and survive in the crypto world. I also believe that there will be more developments and innovation to come that will surprise Bitcoiners in due course of time.