Well even as a holder of Bitcoin, I haven't even thought of this, or contemplating of surviving on my Bitcoin holdings even when I have gotten the stash of Bitcoin I wanted, though at that point I might decide to be taking profit from it bit by bit after retirement, but not like depending on it fully for survival.
Because to me that's the easiest way to drain the asset you should be leaving for your offsprings.
So having another source of income or a business running for you is very much important, so that you wouldn't get to that point of draining your holdings after retirement.
Though I might be wrong, but having a good source of income as a man is something we shouldn't joke with regardless of your financial status or the stash of Bitcoin in our possession.
So in essence of what am trying to say is that regardless of anything, constant cash flow is very much important even when you have gotten to the top of your Bitcoin accumulation process.
Bitcoin is an asset, but not a guaranteed income source. Using it for survival will only deplete the holdings and affect long-term benefits, even if we feel we have enough to live off of. I don't know what others think of the assets but to me, I see Bitcoin as a generation wealth building too, an investment that I can preserve and grow for years to come rather than an investment I want to live off with while I am strong and can still get to work. I know everybody has different opinions and views on this subject matter. But relying on a single asset, no matter how promising it is totally risky. Why not have another source of income, if you feel you have accumulated enough to quit your job? Instead of feeding from your investment you can sell part of it, get a business, or diversify your investment and live off those ones. It will still provide more money to invest in your Bitcoin back.
I repeat again, no matter how promising Bitcoin can be don't take the risk of putting all your hopes on it for daily survival.