Investors create emergency funds so that they can maintain continuity in their investments. People can experience economic downturns at times and when a person experiences an economic downturn, they will naturally not be able to invest in Bitcoin continuously. But those who are very serious about their investments never want their investments to be irregular no matter how much economic hardship comes in their lives. That is why when they have a lot of money, they keep a part of that money aside and consider that part as an emergency fund. However, it may not be possible for everyone to create an emergency fund because not everyone's financial situation is the same or everyone's income is the same. Those who create an emergency fund and invest will undoubtedly be much ahead in reaching their goals, but those who cannot do so try to reach their goals.
It doesn't take a lot of money to build an emergency fund. If you want, you can build an emergency fund over a long period of time along with investing. For example, you can invest 80% of your discretionary income and create an emergency fund of 20%. You can build an emergency fund gradually and you need to keep 3 times your stable income in the emergency fund.
Emergency is not built differently dear, it is estimated from your income after you have removed funds for your basic needs and investment money. You are at liberty to estimate what you should use for emergency. Don't make it look complicated that one have to build emergency funds separately before even getting started with Bitcoin investment. As long as you have discretionary income, you don't have a problem. investing in Bitcoin, start with any convenient amount and then keep the rest as emergency fund to cover for cases of emergencies where you need to spend money not planned for when you are holding your investment. This is the whole idea of emergency funds.
If we go with the idea of building emergency funds separately, people may think that there must be a fixed amount you must have as emergency fund before buying Bitcoin. This can even make some people give up the idea of buying Bitcoin thinking that they may not be able to get the emergency funds. We must make it clear that emergency funds vary from individual to individual. For instance, someone married and with children may need bigger emergency funds than a single person who have little responsibilities. Just check your spending habits and your cashflow to get idea of what your emergency funds should be and you will be fine.