We're not talking about all commodities: we're talking about money.

There's no point in comparing pork bellies to gold: removing an entire year's supply of pork bellies from the market would send the price sky rocketing (in fact, it's probably not even possible since an entire year's supply of pork bellies isn't in stock), while the price of gold would hardly be affected.

The stock-to-flow ratio of gold is several orders of magnitude higher than that of non-monetary commodities (indeed that's one of the defining characteristics of money), so changes in supply don't affect them as much. This will also be the case of Bitcoin, in a couple of decades.