I think that Bitcoin being accepted as a legitimate currency around the world will have it's pros and cons ,but the advantage will surpass the disadvantage ,because of the nature of Bitcoin. With Bitcoin being accepted worldwide , it will offer everyone opportunity to buy a particular product at the same rate and price irrespective of the strength of the country's fiat currency. Secondly , the world will have a sort of currency that will be used for trade anywhere.
I agree with you on the part that government should not be allowed to have control over Bitcoin ,because they will abuse the platform ,and also apply large taxation to their own interest. They will also capitalize on it's annoymous nature to hide their stolen funds ,and thus they can't be probe for their actions.