There are a few reason to think your cat might be plotting to kill you even though they have domesticated for centuries.
The first is their claws. All cats have sharp claws that can do some serious damage if they wanted to. And while they do use them for things like climbing and hunting, they could also use them as weapons.
The second is their teeth. Again, while cats use their teeth for things like eating and grooming, they could also use them to bite and hurt you.
The third is their strength. While cats are small, they are incredibly strong for their size. They can jump incredibly high and run very fast. This means that if they wanted to, they could easily attack you and cause you serious harm.
The fourth is their intelligence. Cats are very intelligent creatures and have been known to outsmart their owners on occasion. This means that they could easily plot and execute a plan to hurt or kill you.
The fifth and final reason to think your cat might be plotting to kill you is their lack of empathy. Cats do not experience emotions like humans do, which means they do not feel empathy for others. This means that they would not hesitate to hurt or kill you if they thought it would benefit them in some way.
So, while there is no definitive proof that your cat is plotting to kill you, there are definitely some things to consider if you think they might be. If you are ever in doubt, it is always best to err on the side of caution and keep your cat away from you to avoid any potential harm.