I agree with you, DCA is actually more beneficial for those who have limited income and can afford to invest small amounts of money, but the sad thing is that those who have such a small income, they are actually in the wrong mindset that they think that Bitcoin investment requires a lot of money, There is no profit in investing small amounts here, which is definitely a wrong mindset. and because of this they delay in investing in Bitcoin, which is definitely a wrong decision for them.
No, I don't necessarily think that all those that are earning little have such mindset because everyone are different and I still think that it depends on who introduce you to Bitcoin investment. If you are opportune to meet someone that knows all it entails to be successful in your Bitcoin investment like jayjuanjee and you get a detailed explanation about it and how to go about it, you will certainly knows that even as a low income earner, you can investment in Bitcoin through the dca accumulating strategy and be successful as long as you have your emergency and reserve funds in place while holdings for a longer period of time like 10 years or more.
So not all low income earners has such mindset.