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 like Gold and silver the difference between them is that Bitcoin has no stable value and a digital wealth otherwise Gold is has a value that cannot be lower rather than bitcoin.Bitcoin as a digital wealth they protect people by not holdaping, kidnapping and others. That's only my opinion .