Of course every single person in this thread isn't sure so that's kind of a moot option.
That said, if the previous years were any indication each year has about 2 bull runs, the first lasting from about May-July and a second one at the end of the year. However, experience has taught me that I can't time the market for shit and that no single pattern can be counted on to repeat itself. So I'm doing now what I regret not doing early Januari, that is pulling out the funds I put in (which was about 1/9th of my portfolio worth in January and about 1/5th now - a bird in one hand etc.).