At some point...the calculation of your (BTC-stack x Price) - (Bills * Inflation) will yield escape velocity.
That is, at some point your BTC will never be depleted simply because its massively outpacing inflation.
Probably if you are at 30-40 BTC at current levels you are already there (maybe less). As BTC tops 500K that number probably falls to only needing a 7-8 BTC stack....
This is why its so important to build up stack size as much as possible now. Literally at some point you will be able to live the rest of your life on 1 BTC.