I think this was discussed exhaustively in at least one thread a while ago, but obviously it's a moving topic so it's bound to come back up from time-to-time.
However, I agree with those who say that while $7bn sounds a massive amount of money to a single person (or a small business), it's actually pretty small beer in the scale of things for an international organisation, even a relatively small one like the JWs.
Also, how much of that money is actually freely liquid and available for use, and how much is tied up? Just because you make X on a sale, doesn't mean it's all immediately available like a wad of bank notes in your hand.
And how much are the legal fees, depreciation, and other legacy costs the org has? Not to mention - we never hear anything about their investments and how profitable (or not) those are likely to be.
Court costs and judgements, freezes and restrictions, and also - potentially - loss of charitable status in various countries could soon eat away at the bottom line (and probably already is).
Also, receipts from properties are a diminishing return if you can't keep building and selling at volume to keep it up, and the org now seems to be reaching a tipping point in their construction merry-go-round.
Before COVID, they seemed to have a nice little cycle going of build/refurb-sell-build again, but eventually they will run out of easy Halls to sell, and their most recent high profile construction projects like the Argentinian and Italian branches, and even Ramapo, seem to have taken longer than usual to complete or are stalling.
The biggest change seems to be a slump in the availability of free labour, as fewer of the R&F are willing or able to give up their time for the org. I think many are waking up to the way the org has been flipping properties, or at the very least they are simply tired and too busy with their own lives.