What else do people need to know about gold? Perhaps they already have many of then in their vault
But they still dont know about bitcoin, that's they search it

Good explanation. Gold is only searched by investors, traders and people who need to sell because they need urgent money.
Bitcoin is still unknown for most people, so the first thing they do if you wanna know something more about it is to search on google. Hopefully they will find this forum or other meaningful resources and not crappy or negative articles.