When it comes to bitcoin investment, we should not invest all of our money in it so that we will always be able to solve our financial needs when they arise.
This discussion has been treated more than ones here, so I believe every investors or a beginner should be able to understand the concept that keeps their investment healthy and running however I believe this is one of the reasons why at @JayJuanGee introduce the method and the reason why an investor should have an emergency funds and also a reserve funds was actually because of a situation like this so that with a proper utilization of it an investors could hardly run into a problem no matter how it may be, however just like you said is not an investment wise to put in everything you have on investment because with the lack emergency funds or reserve funds their is a big chance of getting into trouble on the process.
Yes every system has it ways of favouring people as long as the rules or guidelines is properly obed by the investor, for any one to strive well in the DCA strategy of holding BTC one should have at first seek knowledge of putting all this inconsideration mostly the area of emergency fund, there is nothing that is not achievable if planing is in place, the poor can still strive or survive with a good planning I see many who withdraw their fund it sell the BTC not just as a result of emergency but lack of planing and having short sight to what the Future hold while some may be as a result of FOMO and lacking required information.
Some time many don't do things base on knowledge they have gather from a right source but as a result of what they hard and most time this could be unverifiable facts, what you have strong information leads to deep conviction, just in day of this MMM I hard a friend in school that sip garri while he hard over hundreds of thousands invested on it because he knows the income to the investment, there is no challenges that can leads him within the time frame to pull out any amount out there until the expected date base on the condition attached to it as well the benefits is to gain at the end also. conclusively you take more seriousness on what you have greater knowledge in value than what your knowledge is limited.