Emergency fund is not recommended for investing in bitcoin but no bad to use it because put emergency fund in bitcoin have potential in the future price keep increasing than hold in pocket only, not really difficult for withdrawing emergency fund when saving in Bitcoin due put or hold in exchange wallet and when emergency happening to us we can sell and withdraw to bank account without take 10 minutes. No one can't predicting when happening with something urgent for us and my opinion better put emergency fund in bitcoin investment and seems the same when have parent hold or save their money allocated for children education. Hold in the bank can make it double although we start investing when our children under two or three years and take at seven or ten years later. Its very important allocated our fund for children cost but effective when saving or put in Bitcoin.
It depends on them. This means that those who have done big planning will not mess it up with things that could ruin everything. In essence, they have prepared everything from the start, maybe 30% for investment and 60% for living expenses and 10% for emergency reserves. So, in my opinion, what is called an emergency fund is of course not going to be used for other purposes.
For the sustainability of their investment, of course they have budgeted 30% to continue accumulating BTC. Well, sometimes we get surprise money/bonuses from the office or from other things, of course they can use the funds to buy BTC aggressively when they get surprise funds from the office where they work. Well, at least everything that has been prepared will not interfere with their BTC investment with DCA. That's what I answered from the post above. You can understand it if you have carried out the planning that you have arranged, but if not, maybe you fail to understand it.