You might consider my sustainable withdraw thread to be helpful in terms of the kinds of ideas regarding how to consider withdrawing bitcoin and valuing it, and my fuck you status thread for how many BTC you might need to have by certain points in your journey.
Of course, if you end up retiring 20-30 years prior to your normal retirement age, and maybe we can use 60 as that age (since that is what you mentioned), then surely you would have to have bitcoin retain you for the time that you stop working and the time that those other sources of income (cashflow) start to become available to you.
I personally attempt to consider that we should be attempting to value bitcoin in terms of today's dollar value, so we should be attempting to presume that any future projection of how much we need is accurate in terms of today's dollars, but at the same time, it is quite likely that the way that the dollar (and other fiat currencies) have been so heavily debased in the last several years, there are vary low odds that various kinds of hyper-inflation are not going to kick in at various times, so surely it may well be better to be earning money during those kinds of times rather than being stuck with cashflows that come from various kinds of fixed income sources.. and perhaps bitcoin might be one of the ONLY assets that have any kind of decently good chances of both being able to keep up with inflation (and the ongoing degradation of money) and being able to have some sort of price appreciation on top of it.
There have been many assessments of both stocks and property values that likely show that they have not really gone up in value over the past 20-30 years, but instead have merely been keeping pace with the ongoing degradation of the dollar, so it is kind of a misconception and even a lopsided way in which the ONLY people who have not lost as much are those who are invested, versus anyone who has been relying on cash and income and other ways of saving (not talking about bitcoin) have not really been able to keep up at all, and so bitcoin so far seems to be one of the ONLY ones that is regularly outpacing the degradation of the dollar.. and sure there are some stocks and properties that outperform the others, so there are some ways that you could have had selected stocks that generally outperform index funds and the rest of the market.. but we know that many times asset managers do not even have much luck in terms of just being able to out perform index funds.
I appreciate the feedback and insight. I did read through your posts that you mentioned and found some helpful information.
Explaining to other people that keeping large sums of money in a "savings account" is actually resulting in them losing money over time is a struggle I run into. They ussually say something like but, "I get a 2.5% interest rate so I'm actually gaining money." They fail to understand inflation and its affects on their buying power.
I got funny looks from the account manager at the bank the day I went in to close my savings account and withdraw all of it. She told me I have the highest interest rate possible because I was grandfathered into a high yield account. She said we dont even offer that high of a rate anymore so why would I want to lose that. I asked her what the rate was and she said 3%. I told her that's not enough please close the account. She was in disbelief.
Cost of living is another factor that varies greatly and is impacted by inflation. That is part of the reason why I mention becoming an unofficial expat. I do not have some sort of great patriotism that ties me to any one country. I am perfectly happy hopping around to what ever country fits my wants or needs at any point in my life once retired. There are obviously factors such as standard of living, cost of living, political climate, and Healthcare system that must be taken into account though.
The value of my "over 60 assets" and its buying power is definitely something that concerns me as they are tied to the US economy and USD strength. The world is an unpredictable place and the only thing certain is change. Sometimes I wonder if I made the right decision not to empty those accounts, take the early withdraw fee, and buy BTC with it. I have a friend that did this in 2017 and it obviously worked out for him so far.