re: Serious question about long term planning.

I think the most realistic answer is, as someone stated, to go find a "prepper" and partner up with him and/or her.

You are a doctor, so they will gladly welcome you. Provide them with the medical tools you need and store them in their shelter. It gives everyone skin in the game.

Financially, if the US collapses, then literally no form of investment or currency is safe. So, let's just hope that doesn't happen.