Indeed it is correct that everyone should clearly remember about a separate savings section as the emergency fund is like a financial safety net. Using an emergency fund for a child's needs doesn't seem like a complete healthy plan to me and this plan should be shut down immediately. In terminology it can be said that these things are basically part of your financial plan so it may be appropriate to use personal savings or other reserve savings to enter at that moment. In fact an emergency fund may not be created to cover such expenses, basically everyone tries to save that money to deal with unexpected and confusing financial pressures. It's true that if you don't want to use Bitcoin prematurely, so definitely need to find other options or alternatives but you probably shouldn't touch your emergency fund at all because these funds should be used properly based on risk tolerance and for unexpected moments.
Anyone who uses his emergency funds for child's need do not really understand what the emergency funds was kept for. Child's need is a basic need that should be funded with the money for basic needs. Emergency fund is calculated from the discretionary income which is total income minus the funds for basic needs. When a worker, for instance, receive his salary, the first thing to do is to remove the money for basic needs such as food, utility and other basic things including children needs. After the basic needs have been settled, then the individual can go ahead and calculate what proportion of the balance can be invested into Bitcoin and what proportion can be set aside as emergency fund. I learnt this in the forum as it has been shared by many people in many of the threads like
this one.