Well I think your idea is excellent, I have basically always said one thing, when you have the opportunity to buy BTC with DCA it is an excellent method, because everything is adding and adding, especially when the price drops and if your plan is until 2029, it is a very intelligent plan, the more you accumulate the more money for the future, I believe that in 2025 the price of Bitcoin can grow a lot, it may reach $100k and pass it, but of course we have to wait to see how things are handled, because in the world there is a political scheme that basically speculative markets can be affected, as well as other fundamentals.
Now only if we are investing in bitcoins with DCA method then we only need to aim to invest in bitcoins. So if you invest in Bitcoin at a high price and in a short period of time and immediately sell your holdings when the price of Bitcoin rises then the DCA method will not work. To invest according to the DCA method, the investment must be long-term and the thought of holding bitcoins only, and if you are holding bitcoins with money at any price, then keeping it for a long time will give you the maximum profit and your money will be together. Your investment may be approximately 5 years to 10 years or more depending on your strategy and mindset.
You're right, Bitcoin going lower than 20 to $15k would be a very good entry for all investors, but I doubt if Bitcoin would drop to that point or even go below $40k mark my speculation are that it could drop further to $50k by nextweek but that's just a mere speculation and not something people who come across my statement should ponder more on, the wish of investors especially those who are yet to accumulate more or about to start building their portfolio is that Bitcoin should go below this mark and give them a better entry but then like you've said,
However, no matter how dumping the price of Bitcoin is, there are advantages in every aspect for those who invest in the DCA method. Now in the current period of volatility in the bitcoin market if bitcoin holders buy bitcoins it will be bought deep, and will get huge savings on the purchase price. Later on, if Bitcoin is pumping again and DCA method of Bitcoin holding continues regularly, then that investor will continue to DCA continuously, saving huge on his purchase price. So this DCA method is the easiest and most convenient way to buy bitcoins, but usually you have to plan to keep your bitcoin holdings alive for several years into the future.