I use both strategies. There's no rule in the community that say you cannot use the both of them. It is a matter of convenience.

I dollar cost average monthly and have been doing this and tracking it in an excel spreadsheet since the beginning of 2022.

I also invest lump sums  when I offer some services and the client pays in bitcoin. It is not regular.

The goal is not to make profit but to stack as much as possible until I reach my goal and also for the halving happening next year.