The market is giving everyone an opportunity to buy at a more cheaper rate...
I like this approach.
I will prefer DCA to lump sum. I only encourage lump sum when the market is really down and that is during bear market. But during bull market I do not advise it at all. I also prefer to advice people not to DCA blindly but that they can wait until a price is reached before they DCA instead of doing it weekly.
You can do DCA (Dollar Cost Averaging) regardless of the price if you've done your homework, studied the asset you're buying, and know it's a top-quality asset. Although, as you said, downturns can be ideal times to buy more than usual.
A good point mate, one needs to have some knowledge about the asset before buying, going into the market with ignorance comes with lots of disadvantage, those are the people who easily get scared and sell whenever there's a dip. Nevertheless I believe that people's choices of crytocurrency for investment should be Bitcoin.
So far, that's the most preferred option I can advise anyone on if they're thinking of a top quality asset, it's a choice anyways since some people still prefer to do otherwise as risktakers like they call themselves.