Is it normal to believe that homo sapiens won't live another 200 years?

theyve been sayin the end is near since the beginnin

Nah, we aint that stupid. unless you call being a cyborg the end. We will find uses for you. humans make good soldiers, and the implants will make you obedient. You will still be able to think on your own, just wont be able to turn on us.

Let's hope so. I hope humanity extinguishes itself in this century. If everyone is going to painfully die and suffer, I want to be around to watch and have the biggest orgasm in history.

Nuclear weapons are dangerous, but it's highly unlikely that our species would be totally wiped out by them--It's not likely we'll be in a situation where we equally distribute them all across the world in such a manner as to annihilate the human population. The only other way I imagine humanity could be totally wiped out is through an asteroid impact, and we're not likely to see one that big in the next two centuries.
Global warming won't kill all humans either, it will likely cause food shortages, land loss, and more war and general tension, but it wouldn't kill us off.
I can't say whether it's normal to believe our species will go extinct within two centuries, however, I do think it's overly fatalistic.

It's quite possible the were messin up the environment, proliferating weapons of mass destruction, and increasing hateful treatment of each other. I hope we make it.

Maybe?