Every country has poor people and some of these poor people still make a way to invest in bitcoin so not having a stable source of income shouldn't be an excuse of not getting started with your bitcoin investment besides what is needed to start investing in bitcoin is your discretionary income and not having a stable source of income, those who are desperate to make quick money in bitcoin are not investor but trader because as an investor your major priority will be to accumulate more Bitcoin and hodl for a very long time with the range of 4-10 and more.
Having an unstable source of income isn't just a good excuse not to get started with Bitcoin but also a major drawback. And you say that what is needed is a discretionary income and not a stable source of income, so I wanna know how possible it is to have a discretionary income when your income isn't stable? You get your discretionary income from your initial income so if your income isn't stable, then that automatically means that your discretionary income will also be unstable and so will your accumulation and this is Infact very bad for your investment.
Having a stable income source is Infact one major tool you need to get started with Bitcoin accumulation, except you don't have intentions to engage in consistent accumulation using the DCA strategy, which comes highly recommended for newbies who are hoping to get started with Bitcoin investment. I'm not saying anyone without a stable income source can't invest in Bitcoin, I'm saying that it's appropriate to have a stable income source so that it'll be easier for you to discover and know your discretionary income and furthermore, how much you wish to invest consistently from your discretionary income.