I am not against the idea of buying when there is a dip, yet I see no reason to wait for any dip before getting started, especially since it could take 4-10 years or longer just to build a bitcoin position, unless you are able to front load your bitcoin investment - yet many folks are not able to front load their bitcoin investment, and they end up building their bitcoin position over time with ongoing, continuous, persistent, regular and perhaps even aggressive buying that is within their ongoing receipt of discretionary income.
For me, I would only consider buying when there's a dip when I already have a sufficient amount of bitcoin that's stashed for the long-term, this notion of buying at the dip is probably caused by people that are advising newbies about how to invest in bitcoin, although they're right about dips being an opportunity to buy so they can get as much profit, it's the matter of timing that is wrong. I am guilty of this advice too, I tend to forget the part that they should start investing now no matter what because it's a test too in my opinion, if they can stomach the fact that their investment goes down so bad, will they be able to hold it out or not.
It may not matter a whole hell of a lot if you buy the dip or not, especially if you might be receiving an income every week, and then there can be questions about the extent to which you hold back some of your discretionary income in order to wait for price dips that may or may not end up happening. Waiting for price dips likely puts a bitcoin investor in a wrong mentality, even though surely there could be some psychological pleasure that comes from holding back some value for dips... while recognizing and appreciating that the dips may or may not end up happening.
Now that you mention it, I've come to the realization that DCA is still the best, buying at dips shouldn't be religiously done or as you've said, some dips may not end up happening and at the end of it all, you come up empty handed waiting for nothing at all which is really crazy. In all this, I think that it should go without saying that buying dips is a must recommend thing "IF" if you already have a bitcoin portfolio that you think is already a lot in terms of long-term profit and that DCA is the best approach because it's consistent.