Bitcoin was ment to save yourselves. It is purely anarchocapitalistic. So if by us you mean bunch of individuals? Sure it can save "us".

Some systems needs to stop functioning like zombie companies and so on and that would hurt a lot of people that invest in them. If they would hedge their investments in bitcoin they can "save" themselves.

Price fluctuation is not a bad feature of bitcoin. It attracts the investors and provide liquidy to the market making it more stable - I know it might sound paradoxical but its not. Market is stable as it is always on the trend upwards constantly as of now (in the long run).