For example, if you lose your job and you have no money to spend, you can take money from the emergency fund. Or if someone in your family gets sick and you have no money at that time, you can take money from the emergency fund. You should not always take money from the emergency fund. When you are in the middle of a very dangerous situation, when you see that you have no choice but to sell your saved bitcoins, then you can take money from the emergency fund.
It makes sense to use an emergency fund only when you have no money other than your emergency fund and you are still in an emergency situation. We should not resort to emergency funds at the beginning of a crisis, no matter what kind of crisis it is. If you are laid off from your job or if you or your family member is sick, the first thing to do is to reach for cash flow to cover medical expenses. Then, if you have other funds, take help from them. If those are not enough and you are at the peak of the crisis, then maybe that is the right time to use an emergency fund. Identifying the emergency situation is the most important thing to use an emergency fund. Otherwise, you may end up using only the emergency fund, which is not a good idea.