Emergency fund can be stressful for some people and surely an investor can't hold his investment for a long time with pressure so those investors can invest as they want in this case there is no need to take this pressure. Investors can invest as and when they want and with as much comfort as they can invest, so if it is not possible to build additional funds, then there is no reason to take this matter as a pressure at all. Additional funds can be taken by an investor only as an optional means.
If you do not have funds to start investing in Bitcoin, the first thing is to get a source of funds. It is from the funds that you will set aside some part for emergency after meeting your immediate needs. It is when this emergency funds have been set aside you are expected to invest from the remaining funds. I think this is the right sequence. If setting up emergency fund is stressful like you said, what such person need is not investment but a source of funds. It is as simple as this else the whole essence of investment will be defeated.
An emergency fund is definitely important for investing but not all investors can invest by building an emergency fund. There are some investors who have a small amount of money to invest and they start their investment with that small amount of money and do not build up additional funds. Additional endowment is usually done to ensure continuity of investment in which case those who have good financial support can create additional funds to ensure continuity of investment. But I think it has to be done as an investor has no such thing. Emergency fund can be stressful for some people and surely an investor can't hold his investment for a long time with pressure so those investors can invest as they want in this case there is no need to take this pressure. Investors can invest as and when they want and with as much comfort as they can invest, so if it is not possible to build additional funds, then there is no reason to take this matter as a pressure at all. Additional funds can be taken by an investor only as an optional means.
You might be mistaking emergency funds for something else. Before becoming an investor, you are expected to have already built an emergency fund before considering investment because it is the emergency fund that will enable you hold the investment for a long time. I think a proper understanding of the sequence is important at this point to avoid making a mistake.