People say not to time it but if you took your profits December ish you’re probably much happier than if you had lost everything since then and reset to 6-12m ago unless you’re playing the short. There is a premium on mental health and market volatility.
I find that, as soon as I pick up the crystal ball and try to play the prediction game, my mental health suffers greatly. What helps my stress levels the most is to have a portfolio that is well diversified (e.g. a risk parity style portfolio) and stay the course because the portfolio has elements that go up when equities go down.
At the end of the day, the markets can be blatantly irrational (see TSLA) for wildly variable time spans - this means that market timing is inherently gambling. Gambling with your retirement portfolio is incredibly stressful.