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.
bitcoin investment should never be done with the income set aside for daily needs, it should always be done with discretionary funds, this is to avoid bankruptcy, also any true investor should know to not be stagnant in their investments, starting with $10 isn't wrong, but if you are investing for a period of 4-10 years, then staying at that $10 becomes somewhat wrong, you should know to increase your investments over time to boost your accumulation speed, this also helps increase your total amount of bitcoin at the end of your timeframe.