Morph why do you have it as an article of faith that nothing can bring the organisation down? Surely it’s as fallible as any organisation and collapse is possible. You seem as sure about the survival of Watchtower as any true believer!
In reality Watchtower is particularly vulnerable for many reasons, just a few of which: it relied on media sales for income which is now gone; their own belief in God’s blessing and Armageddon result in very poor strategic, financial and doctrinal decisions; they keep adherents uneducated and socially immobile and thus in no position to donate; they are only growing in poor countries, which are a net loss to organisation funds, and on and on.
If any religion is vulnerable to collapse it is Wa5chtower, yet you say it can’t happen. Why can’t it happen?