There hasn’t been any gold in Ft. Knox in 25 years. This country is broke and heading for a total collapse. If you don’t have gold or silver and plenty of food your life is going to be difficult.
I believe that there is plenty of Gold in Fort Knox and (also) that it isn't tungsten. Just like there is plenty of Gold at the Bank of England.
However in both cases a very great deal of the Gold does NOT belong to the State that is housing it.
Moreover: each gram of Gold plausibly has multiple owners and/or multiple liabilities against it.
Disclaimer: I have no proof to back my assertions, and Fort Knox might really be empty.