It's like any other very powerful human invention. It depends on the inventor. If the person or company who creates AI does it for selfish means to gain power, then that power could turn on all of us. If we create AI as a tool to help humanity and progress, then it could be one of the greatest and best paradigm shifts we have. In the sci-fi story I posted today, I mentioned (in the fictional backstory) that humans were able to establish a Universal Basic Income because most of the labor that was performed by humans was replaced by AI. That's a real possibility, but it depends whether the people who implement AI decide that they want to do it so that their companies can make more money at the expense of their workers, or if they want to do it for the greater good and we use that increased efficiency to support former workers.