they won't.
because an on foot economy would be the same joke.
they are just bypassing credits for reputation, standing, materials, and so on.
at least that's what i assume.
your 5 bio CR at the bank of zaonce won't help you in an shootout at a "western town"
(btw. that "joke" is a good one in parts for me.)
Well, with balls big enough, they could create a narrative that Thargoids invade the bubble and effectively bring the economy to its knees with a collapsed banking system. Outside of the game economy, I'd compensate players for their lost billions with ARX and completely reboot the player progression so that achieving a Cobra Mk3 is made great again (especially if new players begin on foot).
I see zero chance for anything like this, of course, but in such case I would be even tempted to open a second account and start anew, despite I don't like FPS gameplay.