Do a little of both.

Take half, and sit on it for a screaming opportunity to drop that lump sum. Take the other half and come up with a schedule to average it in on a weekly or monthly basis. If that lump sum opportunity arrives, take the first half and the remainder of the DCA portion and lump it all in.

I think there's a decent chance that sometime this year we're going to have a small panic crash while we're still trying to get passed the inflation era and something new and unexpected occurs. If we get a crash your lump sum will go further. If we don't get a crash, you'll have been DCA'ing a bit and then you can reevaluate how you want to continue doing so.