The problem is the world is not ready for another world collapsing of fiat currencies. If the dollar goes down the toilet so do all the other currencies pegged to it. This means that we do need to prepare ourselves if this happens within the next 5-10 years or so. We are not ready although we do have alternatives there.
Yes, I agree with you.
American dollar is just to big and to important for world economy that this currency can collapse.
Look what happened with some big American banks during last big financial crisis, or with Greece recently.
They was to big and to important to fail.
Bitcoin as solution? Maybe for average people and only as second, alternative currency but in world market US Dollar will dominate world economy for a very long time.