Yeah, fortunately or not you don’t really know anything. You just have convinced yourself you do. As thorny_locust noted people have been predicting an impending catastrophic collapse for a long, long time. From Christian millenialists, to Malthusian catastrophists, to American declinists (pretty much around since the founding of the country).
Nothing wrong with being concerned, even seriously worried about the state of the world and country. I am. But full-on wallowing in pessimism and nihilism based on imperfect knowledge is a genuine waste of time. You have no idea what’s actually going to happen and warning your nonexistent children that the future is all futility and despair would honestly be immoral. You don’t have to be a happy idiot spouting optimistic homilies, but Mr. Bleak isn’t much better. Some sane balance is called for. You know - for the sake of your nonexistent kids 
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