Gold is mostly inflation proof, but it has a volatility. The price of a cow in gold/silver hasn't changed that much in the last 5000 years (you can check the prices in ancient Egypt yourself). USD lost more than 99% of its value in a few hundred years.

There are still market cycles for gold, and also if you're going physical, there's 2-3% exchange cost as well.

Silver may or may not have a VAT problem in your country.