Holding physical Gold and Silver is not about getting rich or even investing. It is for long term preservation of wealth. That’s why in your examples the same oz’s buy the same goods but the ratio of paper dollars do not. The gold held its value while the paper lost 98% of its value. Derivatives are for investing. At least until those too, lose their value. Anything backed by paper, stocks, bonds, etc. is a derivative and when the SHTF all their combined value falls into gold.

https://youtu.be/6-kAz2dnN5Y