It's much harder to get mortgage loans today than when the bubble burst in 2008. There are always buyers and sellers in the market, because when the markets swing one way too long, speculators will buy/sell to make money. That's a natural leveling effect of the stock market, because many people do not believe in gold as an investment.
The cost/price ratio of stocks is about 14/1; not bad when one considers the fact that bonds aren't paying enough to keep up with inflation.
Most tend to keep their investments at the recommended ratios between stocks and bonds based on age as a holy grail. I don't follow that rule, because I believe our economy is strong enough to continue to grow, and returns will be much better with a higher equities/bond ratio - even at my age.
My over-all timing on the stock market has been pretty good - even looking back ten years. In 2008, my wife and I lost a little over 10% while the majority loss 40%. I've already withdrawn more from my investments than I have put into it, and it's still at a comfortable level - at our age. It's much higher than the averages when looked at by age groups.
Finally, you wrote,
...if the US or Europe collapses the all world goes down
. True, but if it doesn't, I'm going to ride it to higher levels.
Fear mongering isn't in my blood.
I have faith in America.