The idea of Bitcoin as a tool for world power is quite hard to happen. In the first place, Bitcoin was made to promote decentralization, Bitcoin itself is decentralized that it doesn't tolerate someone to have control over Bitcoin or even outside Bitcoin. What I can see how this could possibly happen is when an entity acquires most of the mining farms. But even with that, the coding behind Bitcoin's logic was programmed in a way that will not let an entity to have control over the entire network.

On the other hand, we can say that an individual could be powerful through Bitcoin if he is rich, and will acquire the most amount of Bitcoin as he can. In this way, he can manipulate the market or somehow make an impact on it.