To participate in Bitcoin investment, you definitely need real income, because if you cannot meet the basic needs of your family, then how will you participate in Bitcoin investment.
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You don't have to have a stable source of income to invest in bitcoin... but you do need to have discretionary income to invest in bitcoin. If you do not have discretionary income and you buy bitcoin then you are likely gambling since by definition you are using money that you need for expenses.
I still wonder how often this can be said before people will realize or know that what is needed to get started with bitcoin investment is not about having a stable source of income but discretionary income and investment made without discretionary income is gambling because bitcoin is for a long time purpose so that's why we are expected to invest with our leftover income since we already settled all necessary and important needs.
I agree with you on the aspect of not waiting to get a stable source of income before getting started, but having a source of income is very important so as to enable us maintain our weekly or monthly routine. Because without a source of income there's no way we can be able to build our discretionary funds and that of emergency fund because is through our weekly/ monthly income we use to build our discretionary funds and that of emergency fund this is why we need a source of income so as to enable us maintain the ongoing buying of bitcoin without seizing.