Bitcoin unfortunatly can't solve worlds problem because money is not everything nowadays. Many governments looking for a bright future in other sources like natural resources and new terretories.
Agree,bitcoin cant solve the worlds problem in the first place the worlds problem begun long time ago before bitcoin born.Maybe bitcoin can help to less population of non income people help them to earn for there needs, but I know bitcoin cant solve the hundreds problem of the world,the government its self cant solve how much more bitcoin.Bitcoin can help to those who believed in it. I mean as of now none other than government solution can solve this issues,them can solve and not bitcoin.