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The example that I gave might even have some room for the lump sum buyer to include some cushion in his decision to lump sum into bitcoin, and there likely is nothing even wrong with lump summing into bitcoin, but then at some point realizing that the BTC price is moving against him, so when he put in the lump sum, he may well realize that there is a possibility that the BTC price could be at a high point rather than having more immediate upside potential, but he still might know all of that and still decide to get in with the idea that he will just buy more if the BTC price goes down rather than up.. so in that sense, he either should be holding back a little bit of his lump sum amount or he already knows that he has an ability to continue to buy BTC in the future, in case the BTC price goes down instead of up.. so he has already built in a plan that the BTC price might go down rather than going up... but his lump sum prepares him for UP, and his continued ability to DCA and/or to buy on dips prepares him for down.. so he is actually prepared for both directions by lump summing in, even if he could have had gotten his lump sum purchase at a lower price (but no one knows the future BTC price, and that is part of the justification for his lump summing in at whatever price he had chosen to lump sum in... No one lump sums into any investment including BTC with a large expectation that it will be going down, even though they may well already account for that possibility).
Under such circumstances would an investor think that they are in good hands in the decisions they make?
Of course they will be wary of a reversal of direction if they have thought about it beforehand so that the steps they will take will certainly follow up with DCA if that happens.
I often think for those who have large capital, for example $10 million, they will easily implement a purchase plan at a cheap price point like last year when the price of bitcoin was below $30k.
But at the same time they didn't and what a mistake, but they executed this year at $60k.
Even though it is their principle to execute now, if they did it last year of course they would get double the ownership compared to today's price.
However, maybe it was their mistake or at that time they were still not ready to do it.
I also see many big companies continuing to buy bitcoin when the price is rising, is that a good decision if they can wait for the low price to get more btc. In principle, sometimes investors don't dare to do it when they have the opportunity to execute at a cheap price. But they wait more and the days pass quickly when BTC has managed to turn things around and they regret not having made a purchase when the price fell.