Hi! It is very nice to see you are developing in such a great way! I am impressed by the way you interact with your community and gain new followers. Now let's go to the point of the contest :)

How AI supported by growing blockchain technology can change the world?

I think combination of these two things will be very useful, revolutionary and dangerous. As you can see in the case of Crowd Machine, Blockchain gives opportunity to rovolutionize the way that we develop, write and run applications. In my opinion that system finally gives possibility to create neural network which actually thinks in the same way as our brains and it leads to create genuine artificial intelligence. Due to that, the most influential companies in the world can be affected, beacuse decentralized Blockchain, especially powered by AI, offers much bigger potential and comfort for its users. I think that recent Facebook's issues and becoming Blockchain more and more popular marks the beggining of the end of the centralized services.
If it comes to the potential purposes of the AI, I think that it will be able to do daytrading much better than we actually do. Although we have some mathematical formulas, analysis and computer programs to predict market fluctuations, AI will be able to take into consideration much more aspects. Its decisions won't depend on its mood or weather and it will be able to predict people's behavior using psychological model.
In my opinion it will also have an impact on social structres. Many of already existing professions can be replaced by AI, so many people will be dismissed probably. However, AI will also open many prospects for new professions, so it will mix a bit the social structures we know today.
I think humanity isn't ready for such a big step, I could compare it to the industrial or IT revolution, but it is much more dangerous and we can't predict its effects for sure. Artificial intelligence combined with blockchain is very exciting and promising but we have to take the responsibility for every potential effect of this technology.