The topic has become a debate of buy the DIP vs. DCA, but it won't truly matter what you "must do". You just do what you want to do or what you're comfortable doing. Plus how you buy will never be as important as what you do after it, which is HODL. If you can't HODL and have a low time preference for Bitcoin, then you have already failed.
Ask yourself, why are central bankers offended by the existence of Bitcoin like it's a declaration of war against them? I honestly don't know why, but if they really hate it and discourage people from owning it, then it's probably doing something right.
Your right because irrespective of our normal discussion about buying the Dip and Holding plus the DCA strategy what matters is the ability to buy Bitcoin because dip, holding and DCA are all intertwine, they all work together, so however those method and strategies are just stated as a guideline that give us the benefits of of seeing the method of investment in diverse ways that could help us adapt to any ways of accumulation of bitcoin in any particular situation or circumstances without being affected on the process.
So just like what you said, the most important is what you feel is okay for you in times of accumulation of Bitcoin through the use of the above strategies as guidelines on our investment journey.