Gold and silver are hedge against inflation/price rise and they protect people's wealth during wars, natural disasters such as Earthquakes, hurricanes, cyclones, economic crisis, 9/11 terrorists attack etc.. so gold and silver are a store of value.
Stock markets are indicators of sales in the economy. When there is sales for the company as per study, they are profits and share price rise. if there is loss, the share price falls.
As a commodity, what does Bitcoin price show or protects people from ??

Bitcoin is a revolutionary asset that protects people from greed and harsh environment which fiat currency, precious stones and metals has failed to provide most especially to those people living in the lower status in the society. Bitcoin is transparent, secure, has privacy and decentralized that is why no one can control it's system though can be manipulated by whales or community but will surely give us financial freedom compared to centralized assets.