Zero fiat is pushing it but I’ve been living this way since last July. There was something about earning interest on a savings and then having to pay taxes back on that too that made me go, this is silly. Why keep a melting ice cube in dollars? I think what’s important to note is job stability. If you have a relatively stable job and are living below your means, then ideally you shouldn’t have to dip into your stack and use your cash flow to pay any unforeseen monthly expenses.
If you’re disciplined with credit, getting cash back and using that to stack more is another great power move.
If someone is able to save say $3k - 5k per month just from living below their means with a steady job, then if something unforeseen happens, that $3k - $5k won’t go to stacking sats, but instead to your unforeseen expense.
This movie isn’t for everyone obviously. YMMV.