Based on the current momentum of the parabola, we should be at 20k by April 28th 2019, assuming we go back in time. If we do, that's great, everyone will be rich today assuming we go forward in time after we roll back. If we continue to go back in time, we could honestly be at 100k by December 17th 2017, back when BTC originally topped out at 20k.
In all seriousness, this parabola is getting exhausted. The two white lines I have drawn indicate at what point the parabola goes literally beyond 90 degrees, something impossible in mathematics as there can only be one output for every input. Then again this autistic parabola I've drawn isn't exactly derived from a mathematical equation to begin with. It's just a curve.