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.
It is worth noting that the Emergency fund isn't as flexible as every other backup funds, such as the reserve or float funds. Tampering your emergency fund or using it to serve the purpose of the discretionary income would only mean one thing, which is endangering your Bitcoin portfolio. The Emergency Fund should in fact be treated as a rigid cushion as it is the ultimate safety net for your Bitcoin investment.
Now imagine a situation where you hit a potential DIP in the market and it's just so attractive that you feel you can't miss buying on that DIP, and maybe in the absence of a reserve fund or discretionary fund, you decide to opt for using your Emergency fund to buy the DIP (leaving your Investment defenceless and vulnerable), with intentions of replenishing it in the coming weeks, and then just after the buy, an unexpected emergency suddenly pops up. Now, there's no emergency fund in place, no reserve or float fund, you're left with nothing but your Bitcoin investment, what do you think would happen in such a case if not to dip into your investment to sort out that emergency...
The Emergency fund is just as important as your Investment and should be treated with extreme caution too, the only time one should seek the assistance of the emergency fund is when an actual emergency surfaces, anything other than that could either wait or be attended to by other backup funds. I'm not in support of the idea that the emergency fund should be considered as a flexible fund that could be extended to other areas or financial needs, except actually emergencies.
In some cases where you have exhausted your discretionary income for bitcoin investment it's not bad if an investor uses little of his emergency fund to purchase bitcoin and still make a replacement back to your emergency fund when things are alright but emergency fund shouldn't serve the purpose of discretionary income using your emergency in a one time purchase of bitcoin doesn't give you a bad method to invest in bitcoin.