Financial capability is not important in adopting DCA strategy, if you do not have the ability to do DCA, then you may not have the ability to invest. For people from all walks of life, DCA is not important whether you have a small amount of money or a large amount of money, earn weekly or monthly income or whether your source of income is unstable. What is important is whether you have discretionary money to invest.
However, if you do not like DCA, then you are free to invest in a different strategy. DCA is very popular, so you are not obliged to invest in the DCA strategy. Invest in the strategy that you like. In this case, you may not have to find fault with the strategies.
It is important to note that if someone does not have the financial capacity to do DCA, they can look for other easier strategies than this but I personally have not found any easier strategy than this. If you have discretionary funds available, you can gradually increase the size of your Bitcoin portfolio by depositing Bitcoin every week or every two weeks. Some folk may get paid on a daily basis or some every month but you should decide based on your personal convenience when it comes to depositing Bitcoin.
Having a stream of income is very important for you to reach the long term or 4-10 year investment stage and DCA method is a fruitful strategy. Discretionary income starts increasing from daily income and as your income increases, this amount will increase and you can also increase the speed of Bitcoin portfolio growth.