Investing requires a steady flow of income. If you don't have a steady stream of income, where will you get your discretionary income from ? When you are just starting out and learning about Bitcoin, you may not have a steady source of income. But to accumulate Bitcoin in future, you need to find a steady flow of discretionary income and deposit with it, otherwise you won't be able to stay invested for the long term.
You don't need a steady flow of income before you can invest into bitcoin what you need is a discretionary income. Some investors income comes in once in a while maybe twice or three times in a year, it depends on how many contract they could get in a year. Yea, I am talking about contractors. Contractors once income can be more than some people having income regularly.
He can invest in bitcoin when gets paid by seperating his discretionary income from his basic needs and expenses funds that will serve him till he gets another contract. He can spread his discretionary income in several weeks to DCA with it. What about a gambler than won a jackpot. He can invest with the money into bitcoin continuously with DCA.
What really matters is proper plan on your income and use your discretionary income properly whether it's steady or unstable in order to keep your bitcoin accumulation ongoing for 4-10 years and above. Some people have steady flow of income but they don't have discretionary income. Your income should be higher than your monthly expenses in order for you to have discretionary income.