But what I have always felt that is important to everyone (no matter your class), is the income you earn. If your income is good enough (assuming a monthly income), then you can choose to buy once and wait patiently till you receive the next salary before buying again.
I agree with you that the important thing in bitcoin investment is the amount of income you earn and also the amount of bitcoin you are able to accumulate from it, but the aspect of waiting to buy every month end may not be the best option or that is not a wise investment approach. For me if a person recieve salary it is not good to invest once every month but we can mitigate the opportunity by splitting it across the week. For example if a person recieve salary at the first month of resumption, he can fix on how to split his fund into the following part, 1 for bitcoin investment 2. For emergency 3. reserved fund to use for the purpose of family expenses and also for buying bitcoin every week(DCA), buy the dip and of course lump sum till the next month of his salary which is the 4th week to enable him accumulate bitcoin at ease, than investing agresively and sell later due to lack of proper planning. So that he can take advantage of buying the dip in some week from his reserved fund than just investing once in Bitcoin and using the remaining amount on feeding and or meceleneous expenses.
Apart from keeping funds as reserves and for emergency needs, i see no reason why someone who is earning monthly will consider splitting his money through the 4 weeks that makes up a month. For any investor using the DCA strategy to accumulate, if they get their income on weekly basis then they should apply weekly DCAing, and if they receive income on monthly basis they should also invest using a monthly DCA strategy. If you decides to split your monthly funds within the weeks, even though you have emergency funds and reserves, you can enter into a condition that will make you to spend both your emergency funds, your reserved funds and the amount you have kept for your next DCA since all the money are still in Fiat because you earn in Fiat, so if it where to be in bitcoin already you will sort out other ways of attending to such situation without having to tamper with your holdings.
Money kept in Fiat can easily be spent than when it has already been converted into bitcoins. I know that the DCA strategy is about accumulating with same amount at different intervals but it doesn't mean we should not buy if we get money from other sources before our main source of income arrives so far as our emergency funds and reserve funds are still very much intact. Taking advantage of the DIP don't really mean it must be on weekly basis, DIPs can be taken advantage of at any time of your investment. How about a scenario whereby you used your reserved funds to buy at a DIP price in a week and getting to the end of the month the price even DIPs further, won't you be regretting why you didn't leave your reserved fund till that period? we ain't in a hurry to buy bitcoin at a DIP but if the opportunity surfaces then it's just a bonus, the most important thing is about strategies to increase your income, increase your DCA amount and own a huge portfolio.