I went through similar tough times in the mid nineties losing a job after buying a new (fortunately small) home and car after a divorce, followed by a job loss and continued custody battle over my son. I managed to survive and recover. But when the dot com bust hit, followed by 9-11, I started to think a lot more about the "what if" scenarios that could have played out. So my new DW and I began doing some serious saving and investing, but always keeping a larger than most emergency fund. I know a lot of people look more at the missing out of potential gains by keeping too much in cash or CDs, but by having several years of expenses in cash, I sleep much better at night. We all saw the markets dive just a few years ago in 2008, and we were fortunate they rebounded within a reasonable amount of time. But the big "what if" scenario for those who maintain debt in a mortgage, car loan or other instruments, is what if the markets didn't come back like Japan has been seeing for a couple of decades. What if the bond bubble burst causing a liquidity and credit crisis along with a drop in the stock market. What if bond funds drop sharply in value or close altogether and bring the stock market down with it. Layoffs could rise and finding a new job may take longer than people are prepared for, and may be for less money. Home equity loans could be reduced/cancelled by the banks if credit tightens, just like they did in 2008. Retirees with everything invested may see a prolonged drop in their portfolios forcing a drastic reduction in the withdrawal rate.
I know a lot on this board don't believe this will happen, or think they have enough to weather any storm. But we're in a situation we've never seen before with global government manipulation of interest rates and such a high level of money creation and debt spending. Geopolitical tensions are rising that could easily trigger a crisis of some sort. Many think things will chug along and everything will be great. Others make fun exaggerating this to be some sort of apocalyptic scenario. I still have half my money in stocks, but I do sleep much better with a large amount of cash and some paid off real estate.