It is vital to have other ways to earn money for your living costs because investments are mostly for growing your wealth over time not for immediate spending. Bitcoin price goes up and down meaning you mostly have to hold onto it for long time so it is not good for paying bills right away. Also thinking that short term trading is easy way to get rich is wrong. It is very difficult to make steady money from it. This all shows how important it is to have mix of ways to earn money with stable income for daily needs and investments for long term growth while understanding their real risks.
Having a steady source of income throughout life makes it easier for someone to target long-term investments because they don't have to worry about how to generate short-term income from investments to cover living expenses. Many people mistakenly believe they can rely entirely on investments and don't need to work to earn money in other sectors. They forget that Bitcoin market fluctuations can significantly impact investment decisions if they don't have other sources of income.
This is different for people who have achieved significant asset growth, as they can strategize about investing across multiple assets and sectors other. For people who are just starting to invest with limited capital, it will be very influential if they do not have another source of income to meet their living needs.