"does anyone else feel like they shouldn't be allowed to?"
No. Technical limitations aside, I doubt it could be contained, but will be leaked soon, so won't profit just a small number of ultra rich.
Step 1: Wait for scary doomsday AI to be leaked, Step 2: ???, Step 3: Profit!!
I dunno, I find it extremely unbelievable that we will get self-improving AGI which chooses to become a slave to humanity at all, ultra rich or otherwise.