You are the one getting it all wrong here, in bitcoin investment what you should first figure out before making purchases is your discretionary income so what's the need saving for emergency fund when you don't have any discretionary income to get started with, rich folks can make arrangements for their emergency fund and discretionary income at a time it's still not wrong because they have money but for low income earners or no coiner you can started if you don't your emergency fund ready as long as your discretionary income is ready and later get your emergency fund gradually as you are buying bitcoin.
Your comment is very confusing. Because we have to find out discretionary income. For example, the amount of money left after deducting all the expenses from your main source of income is discretionary income. A person does not have to be rich to find out discretionary income. A low-income person can find out the source of discretionary income through proper financial management. Finding out discretionary income is not very accurate. Only if a person has the ability to manage his finances properly, then he can find out discretionary income.
If a person already has an emergency fund, it is very good. But if someone does not have an emergency fund and if he waits to invest to create an emergency fund, then it will never be the right decision and it will not be good for investment. Along with investment, a person can create an emergency fund. Along with investment, it is good to create an emergency fund