Jehovah's WItnesses are only a mega-terrorist attack away from credibility.
Something like a nuclear weapon destroying New York City would throw the whole world into a spin.
Such an event has enough likelihood that insurance companies have calculated it into their risks or exempted themselves in their policies.
Tightly run organizations are attractive in times of distress. Right after 9-11 I saw people at the KH I hadn't seen in years.
But, if nothing happens they will lose their grip. The only reason people will sacrifice a "normal" life is if they feel they are in some kind of survival mode.
The Watchtower emerged as an organization because they felt the end was imminent. Even though they failed at the date setting they persist in declaring it is "so close".