Indeed, crashing is inevitable for any civilization, especially a democracy. But, I have heard so many sermons about an "impending crash", that really worried me, and then found out they were 15 or 20 year old messages?????
I think as Christians, we need to be content with being successful in our endeavors, and set aside some as we prosper, and be content with being homeless as well.
But, there have been times in my walk when I have resisted the direction I have felt the Lord was leading because of fears of uncertainty. Now, I am just content with uncertainty, content that Jesus will be with me "whether I am abased, or whether I about", and try to be diligent in seeking Him AS WELL as working with my hands that which is good, so that I may have something to give.
I have wrestled much with these issues, and have come to the conclusion that Christ in me is what God is looking for (I mean that in the most real sense, and not in the superficial way that it so commonly gets thrown around). But Christ in me is pleasing to God, and bears fruit....not choosing a life of poverty or seeking after riches or somewhere in between. Many rich men have been very godly (Abraham, Joseph, Cornelius), and many poor people have been quite wicked.
For myself, I have found that focusing on Christ in me, the hope of glory, is far more fruitful than worrying about ups or downs..which may happen. It also has kept me free from bondage which I once subscribed to over things like buying a cup of coffee or eating out or things like that. I just do what I need to do, and pray for the Lord's leading in it all, but my focus is now mroe on Christ as opposed to other things, not that they can't be a hindrance (riches can be, obviously).