Asides the DCA, Bitcoin investment is for those with a steady paying job, not for people that wants to risk their cash to make quick money, someone without a job can't even hold for long cause they'll be forced to sell during time of emergencies, their only hope would be one their investment since they don't got other money therefore it's not advised and whether DCA or not an investor should have a job already.
The DCA method is not for only those with stead cashflow as I have been made to know by JayJuanGee when someone ask the question in early part of the thread. In his response, even though your cashflow is not regular, you can still figure out a way to invest using the DCA method and that can only require you taking average of how often you receive inflow and then make projections from there. You can be in a
type of business that pays at least once in a quarter. You can do your calculations from there by first calculating what your basic needs would be for the quarter, then removing the amount for investment and even emergency funds and some reserve funds.
Of course, it is more difficult to manage your expenses when you are getting paid in very long time periods such as once a quarter. It is going to be more challenging, in those kinds of circumstances of in frequent pay. Yet, I believe that my earlier examples irregular pay were more about people who might have uncertainty in their pay and their expenses both in terms of the amounts and the frequency, and so if there is a lot of uncertainty, DCA can still be accomplished, even weekly, yet more preparations are likely going to be needed in the cases that pay and/or expenses are irregular in terms of their frequency and/or their amounts... so we try to control as many of the variables that we can, which also might mean that we have to hold back more cash in order to be sure to cover our discretionary income irregularities.