Which is the jump off point for portfolio management theory and risk tolerance approximation.
The problem with the future though is wide systemic problems vastly unlike seen previously. The US population will get smaller as the baby boomer generation is larger than its successive generations. That’s almost the definition of negative market growth and in some cases (health care) it is. That also looks like what Japan has undergone for the last several decades.
Climate change is a whole other bag of large systemic change likely to increasingly play out the younger the investor is.
My point here is the future 50 years will not be as rosey as the last 50 years. And the last 50 years haven’t been exactly rosey.
Edit-my proscription would be: people, not just investors, need to be willing to put in a lot of work and potentially ever increasing work into anticipating and acclimating to the world that’s headed our way. Study up on macroeconomics, micro, portfolio theory, some climate and migration patterns, and how your governments and institutions work. Maybe then you have a chance at survival. Also look for ways to make not just your life better but the conditions for life better for your neighbors, family, and future generations. Resist “tearing down the wall keeping the century-high tide away for the sake of a few pennies a brick.” Resist tearing down “the other” because while it might feel viscerally satisfying it actually creates an environment of prosecution and suffering that you will eventually suffer. Embrace the struggle of survival because it’s what we the living must do.