That's correct. I agree, newbies and those in the industry for years are doing the DCA method, mostly on Bitcoin and other top alts only. Even millionaires do DCA. So, DCA is not only for newbies or low-income earners but for all different kinds of investors. But of course, don't expect too much or expect a high return if your budget is low, especially if you are doing DCA on Bitcoin. Since your investment is low, most probably the ROI is also low. But if ever, don't think DCA is not worth it. Don't get discouraged. A profit is still a profit. It's better than nothing.
What you've said is right, but someone with a low budget shouldn't be discouraged however be determined to hold longer as well as working hard enough to generate more discretionary income, i don't expect that a low income earner should just relax for years without trying to get other income source and increase the discretionary funds.
Increasing discretionary income can come from managing cashflow better to reduce expenses, what some people need to produce more discretionary income is to stop being careless by spending on what is irrelevant, if guys can be more meticulous with managing funds, they'll be amazed at the funds they can save from their expenses budget which they can put back into their discretionary income.
Anyways Bitcoin investment is not a competition and hopefully a low income earner can get good returns in future and change his or her financial status.
Bitcoin investment is a personal journey, trying to measure up with others can be counterproductive since you don't have same income size or expenses with the person and you may find yourself struggling to sustain your investment journey which defeats the motive of using DCA strategy. DCA strategy helps to eliminate financial pressure and stress while you buy and hold bitcoin. If you find yourself struggling to sustain your investment, then you are DCAing wrongly, you should DCA from a place of comfort and not competition.