Personally I think focus on time in the market rather than timing the market because of unpredictability, short term underperformance & effect of transaction cost
Lesson here is DCA

Hi mooers! Time is marked by opportunities, points, and spots rooted in cyclical and periodic development patterns. In investing, market timing is just as significant as choosing which assets to invest in. Timing enables traders to potentially increase profits and decrease losses, which can result in greater returns.
Price is the primary factor influencing trading timing, but market conditions or the overall...