I had a discussion with my Dad about 5 years ago on this very subject. He was saying Armageddon is coming soon. I asked him how he can know that as Watchtower has been saying this for years. He replied it was because the economy was so bad. I said to him "Is the economy as bad as it was during the Great Depression?"
He replied with a tentative "Noooo."
I said "Wouldn't it seem more likely then that if a bad economy was the reason it will come 'soon', that the end should have come back then?"
I got the deer-in-the-headlights look.
I then said "The Watchtower needs to stop saying it's coming soon. They lose credibility when it doesn't. It's like crying wolf. People stop listening to you."