person who is doing DCA may not have that profits because s/he ends up accumulating very little fraction of it.
Mate, I disagree with you on this statement because using the DCA strategy does not mean you will accumulate Bitcoin at a small fraction or get a small profit from your Bitcoin investment. The DCA strategy will help you prevent bad timing in accumulating your Bitcoin and reduce the impact of volatility in your Bitcoin portfolio. Someone might buy Bitcoin worth $1k with a lump sum buy and another person might also buy Bitcoin worth $1k with the DCA strategy, and the person that bought with the DCA strategy might end up having more Bitcoin than the person that bought with a lump sum, because the person that used the DCA strategy bought at different prices. For instance, someone might want to buy Bitcoin worth $1k, and the person choose to buy it with the DCA strategy and divide the $1k into 10 places to be used for accumulating Bitcoin every week, with a minimum buy of $100 every week.
It seems you don't really understand the points he is trying to make, I think what he is trying to say is that DCA involves more on accumulation of bit by bit with a smaller amounts of money one could afford, of course he is right because we all know what DCA is all about in times of people who doesn't have enough money to invest huge on Bitcoin but however instead of waiting and hopping to have enough money before starting accumulating Bitcoin perhaps they could get started from the little they have and keep accumulating consistently although at first it may not worth much amounts of Bitcoin but with time it will surely appreciated.
Mate, read the quote again you will understand he/she says that accumulating Bitcoin with the DCA strategy will make people not have much profit in their Bitcoin investment because they used the DCA strategy to accumulate a small fraction of Bitcoin. If you using a lump-sum strategy to buy your Bitcoin and I'm using the DCA Strategy to accumulate my Bitcoin does not mean that you will have more Bitcoin than me because you are buying your Bitcoin at a go. Both the poor and rich people adopt the DCA strategy when they are accumulating Bitcoin, the most important thing is to adopt the strategy that will be suitable to control your emotions when accumulating Bitcoin and also keep you in a safer zone. Buying Bitcoin with a lump sum will allow you to complete the quantity of Bitcoin you want on time, while DCA will delay your accumulation process, in the end, you will still accumulate the quantity of Bitcoin you want.
The method use for any individual depends entirely on their cashflow, emotion, schedule and general preference. There is no single method of building Bitcoin portfolio that everyone must adopt. If you can remember, MicroStrategy does not employ the DCA method rather they just buy in bulk when they decide to. This does not mean they are doing it efficiently. On the contrary, there are those who prefer the DCA method, probably because they have a steady cashflow like salary. There is no point saying that these set of people will not make much profits because in implementing the method they chose, they already have a target.
I think those seeing the DCA method as slow or non profit oriented are those eager for quick profits and will readily sell at the sight of reasonable profits whereas those employing the DCA method tend to hold for longer period of time as their intention will be more of buying more even though they can also opt for sell when the need arises.