Because Bitcoin investment is not done under compelling circumstances. There are basic needs that must be prioritized apart from investment needs. Therefore, whoever is consistent with their financial management will have maximum results.
Of course we cannot force ourselves to invest in Bitcoin, because it takes a long time to be able to get a profit from the investment and if we still force ourselves to invest, of course when we experience a need that we didn't expect, of course we have to sell it in the current situation if the situation is necessary. Of course we can still make a profit and if it is the other way around, of course we will bear the losses from the investment.
Perhaps your target as a beginner in times of Bitcoin investment shouldn't be for the profits for now instead the main focus should be on how well you can strategize yourself in other to have a good amount of Bitcoin in your portfolio because in every successful investors there are planning, sacrifices and risk he or she took in other to be were he is now and also they are not Propelled by a little profits they could make from there Bitcoin investment at the long run but instead they think about the future of there investment and the likely outcome of it.
That is exactly true - especially since the changes in wealth or value of a guys portfolio could become really stupendous.
Let's say for example a guy bought 10 BTC 2015/2016, and so yeah he fucked up and he ended up paying more than the 2015 price, and so his average cost per BTC is around $500, so that means he has $5k invested.
So in 2017 the price of those coins went up to $19,666 each (which means close to $200k for all of them) and then dropped back down to between $3k and $8k - which is $30k to $80k for the whole portfolio, and so then in 2021, they went up to $69k, which is $690k in value and then dropped back down to around $16k $160k and currently floating around $42.4k.. which is $424k for all of them, so there can be a lot of variation in the value based on price for someone who had made the whole investment for $5k, and so even in a day if the BTC price goes up or down by $5k, then the value of his total holdings goes up or down by $50k.. which is 10x the amount that he had invested into BTC.
So, I am using that example because it is somewhat easy to calculate and to show realistically how some longer term HODLers could be tempted to sell based on changes in price (or value of the total holdings), and even if many of us might continue to buy BTC and to stack BTC, so the numbers will sometimes become more complicated in terms of if we want to calculate the value of some of our coins different than others, even if we might also want to attempt to assess our overall average cost per BTC for all of our holdings too.
There are also a lot of ways that we could end up overly complicating matters or to be overly thinking what we should do or not do, yet if our overall goal is holding most if not all of our BTC, it likely becomes easier to just consider what we might do in terms of mostly holding onto our BTC and not getting so worked up about the paper value of our holdings and how it changes over time, even if we still might have the option to actually pull the trigger and to realize the paper values into real money in our pockets, but there still may well be questions if we are better off by making those kinds of plays rather than just riding out the various cycles and trying to consider what to do, when to do it and/or under what circumstances to do it from a broader framework that may well involve the passage of certain price points, or the passage of certain time points or maybe some other criteria that helps us to plan whether there may be any value in cashing out some or just keeping with holding and/or buying more BTC from time to time.
So however having a proper planning on Bitcoin investment I see no reason why other needs will pulled your Bitcoin investment down although sometimes there could be some unforseen circumstances but however there should be some reservations kept for those purposes while your investment keeps running.
Getting through a whole first cycle is probably amongst the most challenging - especially for guys who likely overinvest and they did not have a plan that was strong enough and/or strict enough to get them through their whole first cycle.
Making it through a whole cycle does not necessarily automatically make it easier to not have emotional issues in relation to your BTC stash and its price volatility, but it does seem more likely that ongoing preparation or buying or even other ways of dealing with your stash does make it more likely that each of us will have better abilities to know how we want to manage our BTC stash once we make it through a whole cycle (that is if we are able to survive a whole cycle.. what would be the odds? Maybe way less than 50%? I am not sure).