Why to invest in gold or silver bars ? Is better gold or silver?

Hi,
Is better to invest in gold or silver bars ? Why should I invest in each of them ? Which one is better ?

Gold and silver are commodities that can be easily traded, because of their high price and low volume.

In my opinion it is better to buy physical gold or silver, than buy a CFD on them.

Advantages of investing to gold:

• High price - big investors and governments are buying gold.
• Higher density - gold is almost twice heavier than silver. 1 kg gold bar is smaller than 1 kg silver bar, so it needs less storage space.
• Used in electronics - chips, connectors and other electronic components.
• Good electrical conductivity
• Low oxidation - much lower than in case of silver.

Advantages of investing to silver:

• Lower price - high affordability.
• Widely used in electronics - solar panels, sensors and other electronic components. Silver is more linked with the industrial economy than gold.
• High electrical conductivity - higher than gold or copper.