So you agree the premise of the thread is stupid?
I notice that the thread title doesn't say "worthless", it says "useless".
"in" = "during"
Yes, gold would be "useless" "in" an economic apocalypse.
But not after an economic recovery.
UseFUL during a collapse would be things you need to survive until the recovery.
So, the advice would be, only buy the gold if you have "excess" wealth after you've acquired all the B's you need. (Beans bullets bandaids and batteries)