You had me all the way, until I got to your last sentence.... and selling is not a necessary basic technique.. especially for beginners and maybe even folks who have been in bitcoin for less than 2 full cycles.
I fully agree with you. The more you accumulate the better it gets. If you see historical DCA chart for Bitcoin then best results are generated if you accumulate for 4 years or more. We can say that the more you HODL then better the results will be. Of course we don't know whats lies in the future but the historical price chart gives us an idea about what strategy we can adopt. As a beginner your first job is to understand the market and start your accumulation cycle.
A small amount of money from your source of income can be invested in the DCA method of Bitcoin. Because the DCA technique can be used as one of the strategies to consolidate resources. Because according to this strategy your wealth will accumulate and your wealth will grow and if the price of Bitcoin increases in the future, the more wealth you accumulate, the more you will grow. So you can get guidance from here as per DCA method chart from any direction. Using unique methods you may face losses, but using DCA method is much less risky and gives better results. This approach is certainly reasonable.