When it comes to bitcoin investment there are things that are important to have and one of them are reserved funds, like you said it helps one when there's a dip, when you are using the DCA strategy and you have also built a very good reserved funds it will help you accumulate more Bitcoin than someone who is just using the DCA strategy without any built reserve funds.
That is why we have the DCA method which you don't need to struggle or force yourself investing bitcoin with all the money you have. One of the most important thing about investing bitcoin is for you to have a steady source of income which you can depend on, then after you might have settle your needs and and keep a little reserve for yourself, you can also think of accumulating any amount of Bitcoin that you can afford with DCA method of investing.
Using the DCA method to invest bitcoin you shouldn't be struggling to invest bitcoin because it is not a must that you must invest a particular amount of Bitcoin in a fixed time, it is something that can be done whenever the money is available.