Do I think the Watchtower as we know it will one day fall? Yes.
Think of the drastic changes just in the last 30 years with information available, the overall education of the general public, the scandals so widely publicized, the false prophecies coming to pass, the mass exodus etc.
They have had to resort to 15 minute monthly publishing rules just to keep the statistics up! (even though I personally believe the WT numbers are grossly inaccurate anyway, people lie on them to avoid being harassed by elders)
They are a fringe cult as it is currently. 6 million wackos with left-field beliefs out of a population exceeding 6.5 billion. As time moves on, they will be forced to change to more mainstream doctrines to be accepted in the public if they wish to remain or grow. Otherwise they will become even more fringe than they are now.
Gullible, naive people looking for answers in cults will never go away. Only the name of the cult and the beliefs they have change.
BTW, not to get offtopic, but Stephanus, your new profile pic is HILARIOUS! I know that's an old picture of you. You looked like a fun-loving guy back then man. Almost reminds me of a bearded CarrotTop. HAHAHA