Income source is important for Bitcoin investment but more important is discretionary income. You have a reliable source of income but if you don't have discretionary income at the end of the week then that source of income can be worthless. Many folk don't have a stable source of income they have an unstable source of income but have some discretionary income at the end of the week and can accumulate Bitcoin from it and I think it's more potential. Over time they have the intention to increase their Bitcoin accumulation and in the future when a stable source of income is created they can more Bitcoin. It is true that it is not important for us to start big but it is important to start with discretionary income initially. Long term Bitcoin thinking teaches us discipline and patience that is more important in increasing holdings and even which is a much better way than risky trading ideas.
Man how would you say discretionary income is more important than reliable income source? Like, what actually gives birth to discretionary income in the first place? is it not the income source? If you don’t have a stable way money is coming in, how would you now have anything left to invest? That source is still the foundation at the end of the day.
And again, I get what you are trying to say about people with unstable income still managing to invest a bit from what is left, but honestly that's not sustainable. It is not even advisable in most cases. Someone with no steady income should focus first on sorting that out, get a job or a side hustle that can at least cover basic needs consistently before talking about discretionary anything. Otherwise it is easy to end up stuck or even worse, frustrated.