I'm glad you mentioned the economy.

Money is a form of communication.

The internet has enabled essentially instant communication between any two or more parties anywhere on the planet.

The next 1929 is going to happen faster than the last one, with less warning, and the impact will be more widespread.

Or ...

We'll all see it coming ahead of time, behave perfectly rationally, and avoid the crisis entirely.

Based on how we handled 9/11, and spent 20 years and $20 trillion to get 1 guy, im preparing for the former, not the later, because most people are not rational in the face of a crisis.