First, it is going to get really interesting once Bitcoin is at a level of adoption that one doesn't really ever need to exchange to fiat. As it is, when I send a remittance to someone in another country they almost always have to exchange it to fiat in order to use it. That exposes them to third parties and the associated fees. Once they can just use the bitcoin itself to buy food then things will change dramatically. Second, decentralized exchanges will eventually exist for exchanging to other crypto currencies. This will make it so that everyone can keep hold of their funds and never have to deposit them at a centralized third party. Once these two things occur the economic landscape will change dramatically. Power may shift from governments and those who wish to control things to the people.