what matters is a steady source that we can be using to do our DCA without any break,
Having a steady source of income doesn't guarantee for Bitcoin investment you might have a source of income without having a discretionary income this can be possible so what is needed to start accumulating Bitcoin is your discretionary income and not your steady source of income. You can invest anytime you have your discretionary income using the DCA strategy every weeks or months.
if you do not have a steady source of income, how then do you think having a discretionary income will be possible? it is from your income that you can make provision for anything that will guarantee effective investment ranging from your investment allocation to your emergency fund and whatever provision you are making.
the goal is to be better positioned as an investor and so, every of the things that makes that happen are all important. as an investor be you at the entry level or one that is already grown in your investment, what is your concern is how to set modalities in place so you can easily build your portfolio by buying a reasonable chunk of BTC. for your DCA to work well, consistency is very important and that is only achievable when your source of income remains intact and can fuel not just your basic needs but also your investment needs.