What would be the best investment in case there is a depression

Think and act on the way to riches/millions

Is it cash, stock, diamond or gold.    No.

You have to be in survival mode.  What counts are food, water, shelter and electricity.  It has to be the survivalist wish list.   

Thus Bill Gates now becomes one of the the biggest farmland owner in USA (no 43). 

1. According to the 2025 Land Report, Gates ranks 43rd among America's largest private landowners with 275,000 acres. Roughly 248,000 of those acres are active farmland,   In case of economic cataclysm, we need food shelter, security.  Back to basics.   

Thus Philippines is good place to come to in case of such an economic disaster

                                                        Even China is aping him