Chunni Fears.

>Am I crazy?

No. Most people are so tunneled vision and will dismiss what they do not want to hear or believe and will write things off as consipiracy theories or "fake news".

>Am I justified? Or am I just talking out of my ass?

It isn't hard to see the patterns or connect the dots and do some research here and there so most will be true.
However, there are other people who believe and see the same patterns and dots, but start to go cynical and pull things out of their ass and missguide people.
Kind of people who "wake up" and then feel they need to go tell the world about it on YouTube (Google) in a hour long video that could be done in ten minutes.

So as long you aren't the person to misguide or mislead people and aren't pulling everything from your ass then I see no reason to see how your own speculations are unjustified.
However the line of speculations and ideas crossing reality and events will be need to noted so that you don't become the person to always 'pull things from their ass' because obviously there is going to be events unreported and what not.

>how to cope or what do they do with such Chuuni Fears

I am quite sure a World War Three, Great Leap Forward of America , or something quite far worse is around the corner but not within immediate distance.

I think some people panic themselves too much and other people are too lax about the situation. I think the best thing is to pace yourself with how you handle things.
Doomsday is not too far and yet not too close.