Priority has been given to figuring out a discretionary income to be eligible to invest in Bitcoin investment but however, there are other way anyone can invest in Bitcoin if they don't have a discretionary income available and that is investing their time and energy in trying to learn about Bitcoin while trying to work out and improve their financial circumstances in to figuring out a discretionary income to accumulate Bitcoin, Bitcoin is not just a trend it is a hope for man kind and of course we should keep encouraging people in to either investing their time energy and resources in Bitcoin because it really worth it.
Anyone that has no source of income have no business investing in Bitcoin because it's through there he will figure out his or her discretionary income from.
He needs to first look for a way to take care of himself and his basic needs first before thinking of investing, and it's true that learn about Bitcoin when you don't have a discretionary income to invest with is not a bad idea but it's very important that you start your Bitcoin investment journey as quick as you can no matter how small your discretionary income is, because you can still be learning while accumulating consistently, because the big disadvantage in learning about Bitcoin when you have no discretionary income to invest with is that you may get too excited with it and start investing money meant for something else, and in such a situation, you will likely sell off prematurely once the needs arises for what the money is meant for, so working on ways to improve your finance so that you can invest is of more importance than put more effort to learn when you haven't even started.