You are absolutely right that it is important to have an emergency fund so that we do not have to sell Bitcoin at a difficult moment and of course we must have an emergency fund before investing. There are most new investors who enter the investment but do not make their financial plan and emergency fund before entering.
Yes having an emergency fund is important when investing in Bitcoin but it's not a must to have it first before getting started into accumulating Bitcoin, what is most important at first is having your discretionary income this is what you use in accumulating Bitcoin then on the process you can think of setting your emergency fund gradually by then you have already been accumulating Bitcoin with your discretionary income either using the DCA strategy and HODL.
I agree with you, it is definitely worthless to think of an emergency fund before investing. One should start investing first and then build an emergency fund to regularize that investment. If one does not start investing to build an emergency fund, then that emergency fund has no value. If an investor follows DCA and at the same time builds an emergency fund for 3-4 months, then at the same time his emergency fund will be built along with his investment. As a result, on the one hand, he can increase the amount deposited by DCA of Bitcoin and on the other hand, he will also build an emergency fund.
However, many people have a misconception about this urgent matter. Many people may think that it is mandatory to form an emergency fund for investment. Such an idea is completely wrong, investment is important to you, so do not take the pressure of an emergency fund into account in advance, but start investing in Bitcoin with the amount of money you have and continue to make this investment consistently.
After consistently managing the investment, when you feel that you have some money left at the end of the month even after spending all your expenses and investing, then you can form an emergency fund with that money.
Now coming to why you should form an emergency fund and what is its use, basically so that your investment is not irregular, that is why many investors form an emergency fund. The use of an emergency fund is when you have a financial crisis, but your investment may be irregular, so that an investor's Bitcoin investment is not irregular during a financial crisis, that is why those investors form an emergency fund with their own extra money and use it later.
Once an emergency fund is used, when the financial situation of the person is normal, then the amount of money that he took from the emergency fund and invested in Bitcoin can be added back to the emergency fund. This way, every investor will not have the possibility of irregular investment. Since I have used an emergency fund, I know that this is a really effective strategy for investing in Bitcoin consistently.