DCA is a very good method for a high volatile asset like bitcoin, and not only that DCA also is a good method for new investors that have little experience with bitcoin, all you have to do is just split you capital into equal parts and invest on intervals, its very stress free and it doesn't involve and technical or analytical skill to acquire bitcoin.
It has nothing to do with beign rich or poor, using DCA does not mean that you don't have huge capital to buy at once, many chose it cause its the best approach to volatile assets, not every have the leverage of having huge capital so they have to use the DCA by allocating some percentage of their disposable cash either from expense or just extra cash to buy bitcoin.
True, I agree with your statement, with the DCA now everyone can be involved in bitcoin accumulation, whoever you are, especially for beginners who don't really know about the world of investment, this is no different from saving usually but maybe the difference is that you put money in bitcoin where there is an opportunity for your money to increase in terms of amount or value. But on the other hand, you still at least have to know about the possible risks that will be the basis of your caution and vigilance in carrying out the accumulation plan. As you said, they just have to divide the amount of money evenly and allocate it within a certain period of time according to what they think is the right time, whether it's once a week or once a month. But on the other hand my advice is that you should really make sure that you have a pretty good income and have never experienced any problems in terms of financing living needs, or simply put, you need to identify your finances, try to prioritize your living expenses first and after that is guaranteed then you can allocate some of your money to bitcoin accumulation according to the plan you have made.
Yes as I said above that DCA makes it easier for all people to get involved in bitcoin investment, the point is that if you have a fairly balanced income in your real life and have a remaining budget that is not too used then obviously you can allocate it to accumulation, and my last advice is to try to divide your budget in three places, namely for living needs, for bitcoin allocation and also for emergency funds, because emergency funds are very important for urgent things that we never know before. DCA does not look at how rich you are, certainly when you have some money left over from other needs (regardless of the amount) then you can get involved by applying consistency to the accumulation activity, there is no compulsion and this is only for those who really feel capable.