The hyperinflated dollar will still be in circulation also, but that doesn't mean you'll get your money's worth for the amount of work you put in to get those dollars in the first place.
As for gold, it is accepted in fewer places than is oil or Dollars.
Barter items are also accepted in few places. But barter and gold will rule if the dollar hyperinflates due to a disaster.
I suppose it might make some sense to have a small amount for some unforseen contingency, but clearly having guns, ammo, Dollars, oil, and various modes of transportation are all more important than holding onto an ugly yellow mass of metal that is worth a third of what it sold for 20+ years ago in non-inflation-adjusted Dollars...
You're cherry-picking a time frame. Take an average of the last 6000 years and you'll see that it has always bought appoximately the same amount of loaves of bread.
It's not my fault that gold sold once for $800+ per ounce in 1980 Dollars compared to $310 per ounce in devalued modern Dollars...