It is expected from us to invest with our discretionary income and not money for family need bitcoin investment is for a longer period of time so is not what you will invest with all your funds hoping to get bigger return tomorrow no this is because bitcoin investment is not a Ponzi scheme so we should invest with our leftover income.
Having a stable income is good but not having it shouldn't stop you from investing into Bitcoin, then along the process you can gradually be increasing your source of income and then increase your discretionary income then you can choose to invest aggressively gradually your Bitcoin portfolio will start increasing.
Yeah Bitcoin investment is something that concerns the future and anyone who's willing to go on that journey should already separate money meant for investment from the ones meant for settlement of other expenses that's why an investor must have a steady flow of income to help maintain consistency for a longer period cause without it an investor could be pushed to sell their coins to settle emergency situations. Someone that invest all their money to get quick profits has a trader mentality and could end up regretting since bitcoin is volatile and could dip instead of pumping as they expected. So, instead of doing that, the best thing is to invest with some percentage of one's weekly or monthly income a figure the investor would comfortably be able put into their investment consistently for long-term.
I agree with you, all investors need to remember that to build wealth like Bitcoin, you need to be focused and consistent. If you are not consistent, you cannot be a successful investor. Consistency is very important in any endeavor. If you do not have money to invest now, then what will you invest with? For this, you need a Current Income. Not just a Current Income. Rather, you need to have a discretionary income. Discretionary income is the income that is left after all your household expenses are met. If you can determine a discretionary income, then you will never have a problem with your investments.
Above all, invest for the long term using discretionary income. And create wealth for yourself.