I thought we went through this in 2000 when all the computers were gonna go haywire. Oh wait a minute the world kept on going. And of course in our old USSR we had economic collapse but wait a minute everyone (well, almost everyone) survived. Same for the Weimar hyperinflation, same for the Argentine crisis, same for the Asian crisis and on and on. Yes people made less money and lost their retirements and there were lots of sacrifices. This is gonna happen here too. I am glad that you are considering growing your own food, that is a smart skill to have. So is repairing cars because people aren’t gonna be able to buy new ones. Welding and sewing will come in handy as lots of things will need mending.
The dried food isn’t gonna last long. Gold doubloons are gonna make you a target of the big bad criminal types and there will be plenty of those. Any investments on electronic trading websites can be manipulated and made worthless, that is the specialty of the Wall St. criminal class. Do you really think you can outsmart or outcompete them? They run your government! They just held a gun to the congress and got $700B a couple of months ago and they can do it anytime they want.
I think you and I are mostly in agreement about what will happen but we differ in the right thing to do. I wish you luck and that is sincere, not in a mean way like you wish me luck. You seem like a smart guy and you will do allright.