It really change the world already. Blockchain is an awesome technology that brings transaction in transparent way where everyone can check the transaction of everyone but with security. You can't check transaction of other bank depositors. But with blockchain you can do it. Not just that decentralized technology will benefit all now. Not only rich people, even average people can invest now in any project. Lot more are introduced to people using blockchain technology and bitcoin started it all. So for sure Bitcoin can change the world. We really can't tell maybe in the future as what other said Bitcoin can be the world currency. CEO of twitter stated that.