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Well spoken because as an investor having the boundaries concerning there discretionary income is very important since is mostly the money they can put in for 5 to 10 years so is very important for someone to focus on that instead of putting more than they can afford, though is very unfortunate that most people do not understand what the discretionary income is all about because most people have so much expectations from there discretionary income with the believe that it will yield them a huge profit within a short term, though I'm not saying that people should not expect profits but like you said it should be something that the investor should perceive on two dimensions either it turn out profiting them at the end or not because that alone will certainly build the persons mindset to accept any outcome without being too much emotional.
Investors can be very aggressive within their disposable/discretionary income, even using 100% of it to invest into bitcoin, yet some of the problems would come from potentially calculating their disposable income incorrectly including keeping in mind that they are not going to access that money for 4-10 years or longer and maybe even they might never get access to that money if their bitcoin investment might go to zero.
So frequently no one is going to be so crazy as to invest 100% of their disposable/discretionary income, and if they do they better have decent back up funds (or other ways to earn or get money) in case they make some mistakes in their calculations of their disposable/discretionary income.
I agree with you. No person should be unprovokedly aggressive in investment or show an aggressive attitude. Because not every moment of your life will be the same. Ups and downs are a part of life. Since you are holding your money for 5-10 years in a place from which you cannot withdraw. How will you handle the downturn in your life if you don't have a back up fund? Today you may be investing your entire discretionary income as your life is going decently, being aggressive in investing, not keeping back up funds. Shouldn't you think about the difficult moments of life later? Let us manage our investments systematically, and build back up funds without being aggressive all the time.
That's just it, anyone that really want to his investment to survive the rainy days must have an emergency fund, because in this world we found ourselves, their are so many uncertainty and so many things might just occurs that might warrant you to address a very pressing financial needs, such as health issues, so if you don't have the emergency funds to fund it, you might be forced to temper with your Bitcoin holdings, which is really not a good thing for your investment plan.
Then talking about those sets of investor that invest more, by investing money they can't do away without, to me, it's just a matter of time, once that financial leverage they have at that time is over, they will be forced to temper with their investment, because that pattern they are using, by investing an amount they can't do away without, will definitely not be sustainable on the longer run.
This is just the fact, I think an investor that wants to last or continue with his Bitcoin journey must have an emergency or reserved funds to enable him or her to allow his hodling to stay for a long-term, unforeseen circumstances are bound to occur so instead an investor to see his Bitcoin portfolio as a alternative to solve any problem that may arise, the best thing to do is to have other source or emergency fund that he or she will fall back to if any situation arises, it has been said severally that intending investors not invest with all they have because as far as humans are concerned problems that requires financial attention must come and once an investor lacks the funds to give it the required attention such in investor will be left with know option than to either to withdraw some fractions of his asset or all of it which is not nice.
For me I have always said it, it better to invest what you can sustain and hodl for a long-term, people are just practicing things that are not part of Bitcoin investment, there is know competition in Bitcoin investment, I don't see any reason why people will investment with all they have without considering inevitable realities, if the plan of such investors were to be a longterm plan I don't think they will go that lane, it is only a gambler or short-term investors that does not understand that Bitcoin investment has principles in which investors must work with to enable them to sustain and hold for long-term.