For me the only reasonable prediction is to look at long term trends, say multiple years, and expect it to follow that trajectory.
There will be another period of fomo, but one can expect as more saavy investors come into the market they will work the market. So one may expect the market to move mostly sideways with a slight uptrend over the course of a year.
That said, I hope it does much better than that.
RE: Diversification Case Study 1: Top 100 in a Year (2017-2018)