%% Good one , good 2. Investors maybe become millionaires, single buy every month or quarter for 40 years; but its not a double down. Nor is a battle tested planned scale in, a double down.
Stocks fell 34% on average in recent U.S. recessions. The S&P 500 fell 56.8% from its peak on October 9, 2007, to a low point on March 9, 2009. A few blue chips are already off 40% such as https://bigcharts.marketwatch.com/quickchart/quickchart.asp?symb=ip&insttype=&freq=1&show=&time=8 but most probably have a ways to go down i would think.