Well in Bitcoin investment no money is made permanent for a particular usage, the usage of this funds are not rigid but flexible and adjustable base on situation and or circumstances. There could be times when emergency fund can be used in the place of discretion fund when there is no discretion but that doesn't mean that it will remain permanent but these only happens when there is a financial difficulty or mismanagement of fund or when our source of income are whimpy. But However I don't mean to say yhat it is advisable to misplace the usage of each of this funds but we just need to know that sometimea we just need to be flexible in our investment approach in other not to follow a wrong investment approach expecialy anything that will leed to selling of Bitcoin when our target has not been met.
If you divide your funds into three levels. For example, emergency fund, cash, reserve fund. If you divide your funds like this, then if you face such a problem, you can deal with your situation very well. Because when you need small money, you can invest money from cash if you want, if your cash does not solve the crisis, then you can use the reserve fund, in the last stage, if you cannot stabilize your situation with these two funds, then you can use the emergency fund in the last stage. If a person depends on the emergency fund for small things, then during a big financial crisis, it will become very difficult to deal with money from his emergency fund.
Many times it happens that some amount of money is needed more in a month. At that time, you can deal with these financial crises by taking money from your cash if you want. He can continue to invest with his discretionary income source.