Most people don't own commodities in physical form for long, usually they buy some stock or ETF which tracks the price of the commodity, typically the ETF or st

Most people don't own commodities in physical form for long, usually they buy some stock or ETF which tracks the price of the commodity, typically the ETF or stock issuer carry the physical commodity, so each stock is backed by the physical commodity. This mostly circumvents the issues of moving a lot of it around and the liquidity issue, albeit you pay a management fee which is fractions of a percent typically. Doing it this way is probably cheaper than the alternative of buying and selling the commodities yourself depending on the quantities you're buying as the firm managing it benefits from economies of scale.