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The control is held by a human on upgrading and developing an AI . That doesn't mean an AI cannot upgrade by itself. They as in those who are programming the AI know it will self evolve itself. The world of AI in 2023 has already made many jobs irrelevant. In just a few years you would see them being part of many things. That means they would be used to for multiple things depending on the necessity. You need to only wait and watch. The future is disturbing for those who are gambles and those who plan to start a online casino platform.
Obviously, because AI or bots are human-made intelligence, any program for development or improvement still has to be handled by humans.
Maybe in the future there will be AI or bots that are even better designed so that they can program directly without human intervention, this is just an assumption so it might happen, maybe it won't.
For online gambling, it seems that later when AI is growing, casinos will also create their own version of artificial intelligence with the aim of being able to suppress the use of AI by gamblers to beat casino games.