Gold is not only used to make jewelry and electronics but also used in almost every industry, every field such as medicine, food...Gold is the best metal thanks to its high purity, non-corrosiveness, stability in all harsh environments and that is evaluated through hundreds of research projects, experiments...it can be said that gold is the perfect substitute for all other metals. But because it is rarer than other metals, it is only used in important fields. Gold has been used and valued by humans for thousands of years, so don't try to deny its importance and value.
In fact, most of us invest money in bitcoin because of its huge returns, nothing more, nothing less. If we are rich or it can't bring big profit to help us get rich from small capital, I guess not many people will be interested in it.