Great Bear Market Indicator

When the top 1% of Americans earn 20% of the country's income, it seems like it is time to exit from the market or at least get conservative with one's investments. I recently found these articles and charts. Each time we crossed the 20% line 1928 (Indicator for Great Depression) and 2006 and 2007 (Indicator for Great Recession) it showed us it was time to become a conservative investor.