The problem with "investing" in cash is that it is a very poor performer. Losing 10-20% per year.
So, most people do not consider it an investment at all.

And the money is not working for you.

However, for a while, cash, the green pieces of paper will be king.
When the banks take holidays and the ATMs do not work, cash will be very valuable.
(not money in the bank)

Why does the iPhone number have to go up????