I would not say that DCA is the "only" method, since there is lump sum investing and there is buying on dips (the topic of this thread), even though DCA is amongst the best of methods to get started right away.. and hopefully, people who get started in bitcoin as soon as possible will end up tailoring their BTC accumulation approach to their own situation.. which may well mean to start out with DCA.. and then to figure out various goals that they have that are personally tailored.. that might take years to play out with various tweaks and adjustments along the way.. that hopefully relate to ongoing learning. and perhaps not devolving into those kinds of desperation and/or gambling strategies that you had referred to in your post Sim_card.
I would strongly agree with your perspective that DCA is the best strategy for accumulating Bitcoin on every significant dips. This approach helps to keep average buying cost at a reasonable level overtime. Attempting to trade Bitcoin with aim to increase quantity of Bitcoin often ends up in failure, as it is almost impossible to predict market through technical indicators. Although technical analysis is a valuable tool to understand the sentiment of the market, but its accuracy to predict market is never 100%, as it is not a perfect science., its relies on historical data and what happened in the past doesn't necessarily mean same will be repeated in future. It is crucial to approach market predictions with caution to avoid any unfavorable outcome.