While reading some predictions from Buddhist masters I encountered a prediction stating that Buddhism would spread around the world approximately 2500 years after the enlightenment of Siddhārtha Gautama the Buddha and further elaborated that the teachings would disappear 2500 years later after this time. Aprox 4401 AD

This made me think and come to a conclusion where I had the idea maybe this could be because the world may end in 2500 years time.  
My reasoning occurred after taking a meditation retreat at a Vipassana centre (www.dhamma.org) I experienced a multitude of benefits and obviously immediately benefited from the eradication of Karmas I have deep within my being, I overcome much doubt, became a happier person experiencing less depression and became very motivated to living a moral existence dealing with such issues as drug dependence and a uncontrollable mind.  
This experience made me question why humans would let go of the effective teachings of the Buddha?   The only conclusion I could derive from this thought was that one day the world for humans will end as will all our valuable experiences and teachings from great sources.

any comments welcome.

End of the world?
No end of the world is going to be.
The world will remain,only the living creatures will disappear And new evolution will begin,its the circle of life and the universe...thats my prediction in this topic

this is something that i dont belive anyone will be able to perdict

Sylvia Brown's prediction just this past March 26th on her webcast with her son Chris, is that the world will end in approximately 95 years, and the prediction of the Mayan's was simply that they had run out of ink so stopped the calendar at that point.

You can re-watch her prediction online. Next webcast is on April 10th.

We're not meant to predict the end of the world.  We're meant to live each day as if our lives will end tomorrow, or the world for that matter.