Thanks!
I'm writing a piece on this question right now, but this is based on the 4% rule, which is actually very conservative given bitcoin's trajectory and my allocation to it.
Essentially, the calculation is [portfolio value] / ([annual expenses] * 25)
So if I understand you correctly you are 100% FI when 4% of your stack is equal to your annual expenses. Your plan is that Bitcoin will continue to grow in purchasing power faster than 4% so although you have less bitcoin each year you will still maintain/grow your purchasing power. I’m about 50 now and figure I might have 40 years left so my FI calculation is based on my stack being worth number of years remaining * current take home salary. If you are researching a piece you might like to look at bitcoincompounding.com and wen-moon online bitcoin retirement calculators. I look forward to reading your research piece.
Yeah that's essentially the logic, although everyone is different. If you plan to have other income ongoing, the FI target can be lower.
Morgan Rochard has a great answer to this question.
https://fountain.fm/episode/KDTmXVCGfUWOIlQzb6jd
Yep Morgen is great, and I listened to this episode. We may differ in opinion on a couple of small things, but her perspective as a financial advisor (which I am not) is super valuable.