Why do you even think bitcoin will be accented as the central world currency? Bitcoin wasn’t created to compete with any currency, or to replace any currency, bitcoin was created to serve as alternative currency, and we are finding that so difficult to achieve, because the government is against it, so you should know that trying to make bitcoin central world currency won’t even be possible.

If we want bitcoin to compete with other fiat currency’s, then we are just trying to cause more problem, because more government’s will end up banning bitcoin in their country, the government knows that they are not in control of bitcoin, so they will never accept it as the general currency, what will happen to the fiat currency which they are in control of, they can easily manipulate it, the government can do anything they like with fiat currency, but it’s not possible with bitcoin.