I agree with you, investing in Bitcoin is very important in the long term, but if you are the sole earner of your family, you should always build an emergency fund,
Building an emergency funds in bitcoin investment isn’t only limited to those who are sole earners in their family, it is something that is of a great importance to all and sundry no matter your family status weather you’re single or not, sole earner or not, in as much as you’re a bitcoin investor whose focus is on the long term goal of consistently accumulation of bitcoin and hodl, you should always endeavor to build up your emergency funds while accumulating bitcoin. The emergency funds is what will protect your bitcoin holdings by preventing you not to tend to selling off your bitcoin holdings too early and when in an emergency situation that requires cash to solve, and thus keep you on the right track towards achieving success in your long term investment strategy.
Emergency fund is essential for every Bitcoin investors, they need it to cushion the effects of eventualities that can occur and warrant the premature sell of their Bitcoin. Every Bitcoin investors should have budget for their income or profits so that they can accurately make provisions for their financial needs and allocate funds appropriately.
Monies that enters into discretionary funds should be well planned for, a financial literate person will make provisions for emergency funds, Bitcoin accumulation and short term needs. If you are able to plan well in allocating funds accordingly you won't be on a crossed road to use emergency funds to accumulate Bitcoin.