Holders have been using this method for a long time, whether they are day traders or long-term traders. And we have also seen that it is effective, and this is also where traders usually make money. Especially if we know how to feel the right timing of buying and selling.
I think I will disagree with you on this, let's not misunderstand DCA strategy for a day traders because buying and selling is totally a different strategy that shouldn't be advised for beginners who just came into crypto because in as much as you feel you can get a higher profits return there is also chance of losing your capital, people who uses the strategy of buying when the price is low and selling when the price is higher tend to be panic sellers who is always afraid and uncertain of the price movement as such there is a very tendency that they can easily get affected if the price is moving against there direction, so as an investors who really understand Bitcoin and it potential, I see no reason why risking your accumulated Bitcoin to Chace the price movement of Bitcoin when the DCA strategy is here to guide you, so on the contrary DCA strategy was designed to help us minimize the risk of investment as such building us not to Chace the market price but instead how we can accumulate slowly but consistent and free from panic of price movement and with the target for holding for long.
Maybe you got @gunhell16 wrong, but I don't, I do this in trading myself. The DCA approach is a general term in investment but traders are buying a similar idea as well in their trading. As in investments where you divide your funds into equal parts for subsequent investment periodically and at different prices to hold for long-term. A similar approach is being employed in trading as well and could be encapsulated in the money and risk management trading context.
In trading, one could have $1000 and decide to divide it into 10 equal parts ($100 each) instead of risking the whole money at once, which is a very good idea to me. I do this often and it's a great idea to be more conservative, calculative, planning and consistent in my trading approach as the market is dynamic, no one knows the trade and the portion that will be most profitable, which is why this idea is wise. Except that DCA is more popular in Investment/HODLing.
I don't buy that idea that trading can be used to increase your bitcoin portfolio. Trading will only distract you from increasing your bitcoin portfolio, because as long as you believe in that whimpy idea of increasing your bitcoin through trading, you must always trade, even when you are making loss. Trading is like gambling, whereby you have the mindset of making money from gambling, you will end up chasing your loss and losing more. If I have $100 like you said, and I didn't trade with any fraction, I will make more profit in the long term compared to someone that traded with a fraction from his $100. We are talking on how to increase our bitcoin portfolio and not on how to reduce it and only DCA method is more efficient. A trader reduces his bitcoin investment and is expose to higher loss than an hodler, who uses DCA regularly.