I would say that perhaps the word "collapse" goes too far.
But clearly, decline.
The organization has seen its heyday and is on its way down. Things can never go back to the way things were back in the 1980’s. The internet has virtually halted outside recruiting. The demographics are shifting toward segments who cannot donate as much. And the JW population is aging even as young people continue to flee. Today’s middle age JW will be elderly.
In a generation, I can see this organization being a shadow of what it was, a footnote. Whatever remains will be like the present day Bible Students, Christian Scientist, the Christadelphians, or some of the smaller Advent denominations.
Of course, a smaller group could well be more extreme and dangerous as it would be less visible and have less outside scrutiny.