This almost makes sense, except that you have to take into the relative value of that amount, in particular relative to one's total net worth. If I want to protect $100, and that is all the money I have, I'll worry about security a lot. If I have $1,000,000, protecting $100 is not a priority.

The general assumption is that people put all of their money in one place, which is not true for anyone I know -- poor, middle class, or rich. Everyone has cash, bank accounts, various physical valuables, stock, etc.