Investing in Bitcoin doesn't mean you must have a lot of money if this is true then poor wouldn't have been accumulating Bitcoin though many people still have this mindset that Bitcoin investment is only for the rich but this is not true with that your small amount you can still be accumulating Bitcoin provided you have know what should be your discretionary income to get started with, through the DCA strategy you can be accumulating Bitcoin gradually with your small or big amount consistently and persistently either every weeks or every months and hodl for 4-10 years.
Everyone, rich or poor, can invest, if they have discretionary money or a source of discreet income. From my point of view, there may not be a person whose monthly income is less than $200. Maybe there is, but I do not know that. If you can set aside $50 discreet money monthly from this $200, then I think you are still eligible for investment. The amounts mentioned may be more or less, but I think more than $20 discreet money per month is eligible for investment. Although the amount is small, but in the long run that money can be more than the expectation of a person.
So I would say, do not give importance to the amount of income or your position for investment. Rather, give more importance to how much discreet money you can set aside. If you do not have discreet money after meeting your daily needs, then I will say with great sadness that you are not yet eligible for investment. You should look for a discreet source of income and keep the enthusiasm for investment alive. So that you can jump into investing as soon as you find a discreet source of income.
I would agree with your point that it is not about having money to put into Bitcoin, but having a strategy and following it. The amount required to begin is the notion that many people still hold, but the truth is that with Bitcoin being so divisible, it enables even in the tiniest amounts. The key is consistency. By initiating DCA, even with a small amount that you are willing and able to spare, such as 20 or 50 dollars a month, you can create a very strong position after a few years, and enhance its power by combining it with long term holding. The attitude is as important as the cash itself. When a person is not able to save any surplus income at present, then his main priority is to raise the earning capacity and then only he may start investing without hampering his daily requirements. Bitcoin will reward those who think longer term, not short term, and small is much better than none.