When you say you know how crazy it is, are you talking about how you know there's no antivenom to their neurotoxin, you have a 99% of being dead in less than 20 minutes, after a bite and when bitten, you're also injected with an anisthetic, so that you have no idea you've even been bitten?
If you know all that, then good. Hopefully, you're not keeping these in a residence where there are children present.
As with any octo, they need a species only tank, absolutely pristine water conditions and an over sized skimmer on the tank...as well as having the tank 150% escape proof.
Also, they're not always yellow, with the blue rings. Most people want them for that reason only. 99% of the time, they're tan/beige/brown or grey. The only time they change colors/the rings show up is when they're aggitated.