personally, i think that the approach one adopts in making provision for an emergency fund should be one that is finance friendly such that you don't delay investing in bitcoin just because you want to make provision for your emergency fund. remember that the main thing here is that you are investing in bitcoin and the emergency fund is just what helps you stay invested for the long term. having this understanding helps you to set priority right such that your attention focuses more on building your bitcoin stack above just setting up an emergency fund.
using the first three months to build just an emergency fund is unnecessary but there are better approach of going about it. for instance, for the first five months, you can discipline yourself to use 60% of your earning for your basic needs, 20% for your emergency fund and the remaining 20% for bitcoin investment. for that period of five month, things might go a bit slow for your investment but since you know that you are making a sacrifice for what will eventually help you in the long term, then you should be ready to follow up your plan without being worried of your short term difficulty. at the expiration of that period, you know that everything about your emergency fund is well sorted out and the 20% can then be added to either the allocation for your bitcoin investment or your expenses. again, the way you decide to split your earning is going to be totally up to you to decide but the main point here is that building an emergency fund can still go hand in hand with building your bitcoin stack.
another thing to take note of is that an emergency is not something we know how much it will require of us to get it fixed. there is never a guarantee that what you have kept as your emergency fund as a newbie investor will be enough to sort out the uncertainty that might unfold even though it is possible that you might eventually make use of it. but even at that, it is better to set a reasonable fund aside that can keep you moving rather than expose yourself to the risk of uncertainty.
from the little period i have stayed invested, i have had a first-hand experience when my income source seems to slow down a bit and the urge to take out a portion of my holding creeps in, fortunate for me, i have a working plan that helps me stay invested through whatever short-term storm that arises. failing to set out a good emergency plan or funds on ground is a clear indication that you don't value the safety and longevity of your asset.
You are correct however I will like to make something clear so it won't be confusing to some set of people or make them do something that will affect them later in the future especially the newbies now you said one can discipline his self to use 60% of his earning for his basic needs, 20% for his emergency fund and the remaining 20% for his bitcoin investment now this advice you gave here can lead some people into financial problem because is not clear the reason why I said so is that the only money we should use for building our Bitcoin investment and our emergency funds is our Discretionary income and not money meant for our basic needs if you want to discipline yourself in building your Bitcoin and emergency funds together use only your Discretionary income to do that, if your Discretionary income is 20 percent of your income then divide it 10 percent for your Bitcoin investment and 10 percent for your emergency funds, I'm making it clear here so some newbies will not make the mistake of using the money meant for there basic needs to build Bitcoin and emergency funds all in the name of wanting to discipline there self's because if they do they will surely get into a financial problem that will make them dip hands into there Bitcoin and emergency funds when the time is not right there by destabilizing them.
Are you sure you know the meaning of descretionary income? Because I don't see where @Marvelockg said we shouldn't invest in bitcoin with our descretionary income. Discretionary income is gotten when you remove your basic needs money from your salary the remaining percentage is your descretionary income. And I can see he allocated 60% of salary to basic needs which I think it's fair enough, considering that an investor needs to make some level of sacrifice and the remaining 40% is the descretionary income. @Marvelockg never said people should invest in bitcoin and build up their emergency funds with money from their basic needs allocation. It's you that not understanding what he's saying. Probably you are not reading through the lines to understand him. I took my time to read through his post that you quoted him and everything he said there was in line with the principles and teaching of this thread.