[Edited Out]
The DCA method is flexible so everyone can follow it to invest. If a person has discretionary income, then he can easily follow the DCA method and invest with a long term mindset. If that person's income becomes irregular or he has a lot of responsibilities where he has to spend more, then if his discretionary income starts to be generated irregularly, there is no problem even if he does DCA irregularly with that fund. Even if he does not have discretionary income in a month or week, then there is no problem if he stops investing for that month.
But if you think that you have to invest regularly, then if you do DCA overly aggressively, then that is the wrong mindset. But for those who have high expenses or have to fulfill many responsibilities in the family, it is better to keep a strong backup fund.
In my opinion, the most important thing when doing DCA is not only to buy Bitcoin regularly, but also to keep your own financial situation in order. Because even if you plan to hold Bitcoin for the long term, you may have to sell Bitcoin due to lack of cash if an emergency arises.
Suppose, every week someone has an extra $100 on hand after spending. If he wants, instead of spending the entire $100 in Bitcoin, he can buy $60 Bitcoin and keep the remaining $40 in an emergency fund. After 20 weeks, he will have $1,200 invested in Bitcoin, as well as $800 in cash. Then suddenly there is a need when he will be forced to sell Bitcoin, if he has $800 in hand, he will not have to sell the saved Bitcoin.
So, to me, a good DCA does not mean buying as much Bitcoin as possible. Rather, buying regularly in such an amount that even if the market goes down a lot or if a sudden expense arises, he does not have to sell Bitcoin. I think it's more effective in the long run to maintain a balance between your essential expenses, emergency funds, and extra income.