It is assumed that when AI and blockchain come together, they provide more security, but we do not know what side effects it might have, and if something is done, it has to be 100% perfect, because if there is a failure they can dominate the world by themselves.
Artificial intelligence will replace a portion of human work, because it can be programmed as desired so that the results of their work are better than those done by human power. The most accurate example is robotic used in the automobile, or spacecraft industry, the accuracy rate is almost 100%. Blockchain technology combined with AI makes work very maximum in yield and efficient in financial expenditure.