But what good does it do to have such a instant information on speculative value outside of the world of making money with it ?

I think we can both agree that there is a lot of value in knowing the "actual value" (as opposed to speculative value) of things in our society. Knowing the actual value of things is impossible for multiple reasons it (it changes very fast and is just intrinsically very hard). However, given a big incentive (making money) we can let the market estimate the value of goods for our society. This speculative valuation is far from perfect, but it is the closest we can get to the actual valiation of goods/institutions.