I do not think you are understanding what i'm saying. I will clarify;
You can use a chip. Sure a rfid chip could work as part of a hardware wallet thing, not on its own because anyone can read the passive reading on the chip, for a spending wallet in your everyday usage
OR you can seal in a sealed capsule, the size of a grain of rice, an encrypted hash, that no one knows whats on it. Not the doctor, not anyone.
Its totally hardcore, and i would not to it, but, unless you have made it known that you own millions of dollars in BTC' in which case it does not matter where you hide it, criminal could extort you, its just as secure as hiding it in your socks. Or more

Yea but i mean doing the whole thing is so odd that it definitely raises suspicion what you want to hide in there.
People dont just put chips in their body for no reason, so if somebody does that that somebody surely hides something important there, so they will try to steal that.