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.
Its a possibility that he is truly dead because whether he is alive or dead has not stop the growing and popularity of bitcoin and the only thing for me that it has added is the fact that we have so many people claiming they are bitcoin but if he is not dead he should just let us know so that when he eventually dies because everyone will surely do that one day. But he should just help us solve the controversy surrounding his personality and everyone claiming credit for this project...
He is not obligated to do a thing, if he wants to remain anonymous then that is his right, since remaining anonymous seems to be his choice, any information that he gives about himself could be used to try to identify him, so if satoshi does not want to use his accounts ever again that is fine.