Uh, sorry, but your post makes no sense. Modern money is an abstraction. Even the “printing press” is electronic these daze. Unless electricity stops working, commerce will still go on. And if the that ever happens (aka, an EMP attack), cash will be worthless anyway.
Actually, his post makes A LOT of sense. Consider what would happen if the credit market freezes up (as it nearly did in 2008), and there is a "bank holiday", where the banks are closed for some number of days, and your credit card doesn't work and the ATMs either don't work or limit how much you can withdraw.
What are you and everyone else gonna do? Your digital dollars are worthless in the short term. How are you going to get to them? What medium of exchange are you going to use to put gasoline in your car? Cash that you have under your mattress will be king, until the crisis subsides.
Broker is wise in recommending an emergency cash stash in small bills.
As the Boy Scouts motto goes, "Be prepared."
Thanks, Broker.