In reality the financial situation of people does not move in straight line. Because there are lots of factors that can affect their financial state, since there are certain changes happening in their life like income fluctuation, seasonal cost and their family obligation.
I agree with this point. In real life, no one financial situation is the same every month. Today's income is good, a few months later, income may decrease. Also family responsibilities may increase, medical expenses may come, and a bonus or extra income may come in some month. So it is not right to make a Bitcoin investment plan in such a way that income and expenses will remain the same for the next years.
But this is why backup funds are even more important. If you have to stop buying Bitcoin when income or expenses change, or worse, sell existing Bitcoin, then the financial setup was not very strong. Backup funds give the investor some flexibility. In case of a minor mistake, decrease in income or unexpected expense, the investor gets the opportunity to manage the situation without immediately depending on the Bitcoin holding .
This is the reason why many people like the flexibility what DCA could do for them, because despite of some challenges came it help people to remain consistent with their investment. Also they should invest when there's discretionary income appears and better not to force anything like putting same amount in every period while they are struggling.
A common misunderstanding needs to be cleared. There is no such rule that DCA means buying exactly $100 every particular day . DCA can be manual, automatic, the amount can change, and if income is irregular, the buying time can also change. So, a freelancer or contract worker does not have to have a fixed salary to accumulate Bitcoin. Suppose someone gets $150 discretionary income after paying expenses this month. He might buy $50 or $100 Bitcoin. The next month, only $20 is available due to extra expenses, so he can buy $20 or buy nothing depending on the situation. The next month, he gets $300 discretionary income. He can buy more. This did not make his investment plan fail. Rather, he is planning in line with his real cashflow.
There's no doubt that emergency is helpful to us investors, but it does not eliminate the risk that's why people still need flexibility. Then this is when we could see that DCA is truly a great strategy to use, because it naturally adapts on real time financial situation of each people or investor, instead of assuming that they can put the same figures every week or month.
It is true that emergency or backup funds do not eliminate risk. There is no guarantee that any backup fund will be so big that it will cover all possible problems in life. But the purpose of backup funds is not to completely remove risk. The purpose is to create a financial situation so that you do not have to sell Bitcoin due to common unexpected expenses.
DCA itself does not automatically adapt to your financial situation. The investor has to adapt to it. And it would not be right to consider DCA as a complete risk management system. DCA is basically a method of accumulating Bitcoin. Backup funds, expense management, discretionary income, and position sizing are separate issues. When these work together, the system becomes strong .