Hodling Bitcoin for the long term is not the same as trading it. If your main goal is to hold onto and gather as much Bitcoin as you can, learning about the technical analysis of Bitcoin might not be necessary. It's not a bad thing to learn, but it might make it challenging to save and hold onto your Bitcoin for a long time if you're constantly using your funds to trade, and trading involves risks with no guaranteed profits. Someone investing in Bitcoin should focus on securing their funds as that's the most important thing every Bitcoin investor should understand.
Maybe what you said is quite correct because if they are long-term Bitcoin investors they don't need any tactics in chart analysis strategies to make Bitcoin purchases because they can buy gradually with DCA at each stage. Another thing like what Saylor has done is where he doesn't care about the price because he buys and accumulates BTC in his portfolio. Apart from that, the most profitable purchase is of course to wait for the price to dip and hold for the long term as in the main discussion of this thread.
Every Bitcoin investor, whether they play in the long term or short term, definitely wants to achieve big profits on the investments they have made so far. I think basically those who bought at the $15K dip of course they have made quite a big profit from this rising moment. Maybe the big dream is $100k in the next few years and all of that will be a big win if the holders are able to hold BTC until BTC reaches $100k.