It isn't compulsory or necessary to set up a reserve funds before investing when you don't have any already on ground before you decided to start your bitcoin investment. Reserve funds isn't the priority among all back up funds. The most important of all back up funds is the emergency funds because that's the major back up funds to your bitcoin investment and should be the highest in amount because it's at least three months of your monthly income.
Any new investor that does not have an emergency funds isn't advised to wait and build his emergency funds up to three months of his monthly income before investing because he will b web wasting the time that he is supposed to use to start his bitcoin investment and increase gis bitcoin portfolio overtime. It isn't easy to build up an emergency funds of at least three months of your monthly income because it can take up to a year or more.
This is why you should start investing in bitcoin right away without your emergency availability, if you don't have. You can share your discretionary into two parts and use one to start your bitcoin investment through DCA weekly and use the othwr part to build up your emergency fund till it gets up to three months of your monthly income. After that, you can channel that money which you are using to build your emergency funds into building your reserve funds, and after that you can invest into bitcoin aggressively with the funds.
Emergency funds is whatbis used to take care of reak emergency when it arises during your bitcoin accumulation journey. Reserve funds, is a back up funds to your emergency funds and it is used to buy at the dip or used first before touching your emergency funds.
In the context with which @Rockstarguy was referring to, it was for people who couldn't meet the requirements of having reserve funds due to low income, so the availability to even have a discretionary income to share into two parts is minimal, which was why I was saying,
an investor needs to have some reserve funds no matter how little it is, maybe emergency funds would have been the right word for it, but it is all to make sure that the investor has something outside his investment to always fall on whenever the need arises.
I will be talking about the bold words in your statement only, according to your statement, it's as if you are taking reserve fund and emergency funds as the same thing, no they are not.
Emergency funds is the money set's aside as the final defense for your Bitcoin holdings, it can only be used in real life emergency situation, but reserve funds is a money set's aside that can be used to buy aggressively during the dip or to foot's other bills that is not planned.
So in essence of what am trying to say is that, though they are different in what they are kept for, but they are very much vital for you to be successful in your Bitcoin investment, but try to know that they are not the same, and they are of different use.