Lump Investment or DCA? Significant Liquid Cash on Sideline

I have a decent amount of money (think low 7 figures) in a HYSA. I know the saying is you can’t time the market but with the market gains the past 5 years I can’t help but think we may experience a downward swing and am a little reluctant to put it in all at once. I know in the long term it will be fine but a short term swing of 20-25% would be significant for me.

Is it still wise to do a lump sum investment or should I invest it little by little over time in case of a large pullback in the market. I feel like I’ve been bearish the last few years and it’s hurt me as I’ve missed out on some nice gains. I am 31M btw. Thanks in advance.