Well if I made an ASI, I wouldn't tell anyone about it, and just use it to trade the stock markets until I own everything, and no one would ever know it was AI related. I might become famous as being the smartest and richest man in the world, I'll have to start wearing a top hat and a monocle, but no one would suspect it's really thanks to the ASI, "because that can't be hidden".

On top of that I'd get the ASI to develop cutting edge technologies. The most obvious being software, I'd tell it to develop next gen viruses and crypto and apps, but to make it look like a human might have designed it. I'd use those to gain more control over the world, but no one would suspect it's really thanks to the ASI, "because that can't be hidden".

And with all those resources I'd start companies, and tell the ASI to design next gen technologies and products that my companies would build. I'd be considered the smartest man alive, creating things that no human ever thought of, but no one would suspect it's really thanks to the ASI, "because that can't be hidden".

And with my unfathomable wealth I'd finally create really advanced technologies in secret, where the ASI doesn't have to pretend a human could have designed it. Things like teleportation and telepathy, which I'd use in secret to become the ruler of the entire world. And people will wonder how I became so powerful, how I could do things that can't be explained, but no one would suspect it's really thanks to the ASI, "because that can't be hidden".