Best strategy for $30k ETH purchase?

I recently transferred $30k in Roth funds to an IRA that allows me to purchase ETH The transfer took longer than I anticipated, and I missed the recent pullback to 3400 and now it’s at 3750. I know the ‘prudent’ path is to DCA in, but I’m worried I’ll be on sidelines while it climbs back to ATH and beyond. Any suggested strategies here? I also have a history of FOMO’ing all at once, only to see a major dip and kick myself!