Another thing every investor should do before investing, and that is to ensure their income, and develop an alternative source of income.
Before starting investment, it is not mandatory to work in addition to the source of income. To start investing, we need discretionary income. If a person is able to find a source of discretionary income, then he can start investing.
Starting investment is important, after starting investment, if he is not able to continue his investment consistently or is not able to find discretionary income, then he can do extra work, but it is not mandatory to do extra work to start investing. But yes, there are many who cannot manage their financial situation properly and spend more than their income, they should be able to find discretionary income by reducing their extra expenses and continue investing consistently.
However, those who have less source of income and have a lot of trouble finding discretionary income or are unstable but they find discretionary income, should start from the situation they are in and after starting, they can find more sources of income and keep trying to bring their expenses under control.
Yes, I agree with your point, having a discretionary income is enough requirement for starting bitcoin investment. Is not mandatory that you must have many sources of income before starting invest, a lot folks delay their investments because they think they need higher income first, but in reality, the most important step is to begin with any amount they can be comfortably afford to leave untouched, and for some people who find it difficult to start, discretionary income can be created simply by reducing some of your unnecessary expenses, even if the amount you have available is small, to develop that habit of investing consistently is more necessary than amount invested at beginning.
In my opinion, waiting for reasonable amounts before investing is not an excuse, is a waste of opportunities, starting from your current position and remaining consistent, gradually increasing your over time can be a sustainable path toward building your investment.