Nobody seems to have a good answer to where Satoshi has gone and why he and his coins have not been seen for years.
I can think of only a few reasons why that might be.
1. He wants btc to succeed and knows spending his coins will cause a massive panic.
2. He is already rich and has no need for more money.
3. He was hired/tagged by an agency or institution and is under NDA.
4. He is sick of btc.
5. He hates attention/spotlight and does not want the leadership role.
What if the answer is even simpler? He had a car accident / heart failure and died. His wallets are lost and therefore never spent.
This is so much more reasonable and probable than "satoshi is an AI" or other crazy theories here. It's sad, but I think this might be the truth.
I guess you are right, your theories are a lot of reasonable than the others saying that Satoshi is an A.I which is really ridiculous. The number 5 in your option is probably the right one why Satoshi Nakamoto is hiding himself from the crowd, because he might thinking that many people envy him and wants to kill him for his money, since he is a really rich man because of his Bitcoin, I guess this is his only reason for hiding in a cave, just my opinion.