they sold off 2 billion $$$ worth in real estate holdings
But they cannot do that again and again, and they will keep selling Kingdom Halls as their numbers shrink. That has limits.
I doubt the core faithful will walk away because of any mismanagement or GB actions. They will possibly die off as numbers continue to decrease- because recruitment of outsiders and retention of the children is way down and will never recover because of the internet. Or maybe when there are few left, the GB will take their leave to some tropical island compound, leaving instruction for all to fend for themselves.