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 has nothing to protect but for the interest of the investors only,people inside cryptocurrency are here to gain and earn so whats the only concerns here are the future investments
People are the one who needs bitcoin because of the technology behind this,and bitcoin needs people for this to grow and progress so in that case,both need each others