If I genuinely believed in an imminent cataclysmic event where the majority of mankind will be murdered, even as a witness I would be living on my nerves, in fear of dying. I don't see this in JWs, they only parrot the party line with a smug smile, "It's very very close". Methinks they don't really believe it, just the principle of it; we're right and everyone else is wrong so God must favour us.
It must be very debilitating to suffer from a delusional disorder. The world pities and sometimes mocks the sufferer.
There is however something worse-- to have eight million people, orchestrated through propaganda and mind control, to suffer from the same delusion. The only reason JW paranoia has the slightest credibility is because of the number of witnesses already believing it.
For JWs it's an irrational way of life based on Biblical hype and the promise of winning the jackpot but in reality with no prospect of any reward and a complete waste of one's life.
The real beneficiaries from keeping the delusion going are those who run the scam, the governing body of Jehovah's Witnesses.