Supply chains are disrupted everywhere, wouldn't it be a quite reasonable precaution to have a large amount of cash on hand, like having a months worth of toilet paper, just in case? Running out of either is not fun.

I also have 1 real US dollar that I keep in my wallet as a reminder, it was minted in New Orleans in 1901, it's 120 years old, and can't be inflated away like Johnson sandwiches or paper money.