If I were Satoshi Nakamoto, I would probably send the entire 1M BTC to charities around the world. I would not dare to appear and have my identity revealed for fear of endangering my life. Bitcoin has succeeded beyond all initial expectations

Why would you do that when everyone's eyes is on the Satoshi coins. If anything did happen to the coins, it will affect the bitcoin price. It will also be good if we see that bitcoin in the address as a bitcoin reserve. When people remember that one address has such amount of bitcoin, they might not think of manipulating the market.
- Would you dare to appear in public?
There's no need appearing again while hiding for many years.
- Would you move 1M BTC and sell for USD?
This is not necessary because bitcoin is continuous and not ending tomorrow
- Would you participate in the development and upgrade process of Bitcoin blockchain?
Yes, because this is passion and wherever Satoshi might be, he is doing that already I guess.
- Would you agree to accept the invitation to El Salvador?
Yes, maybe to create more fundamentals.
- Would you continue to stay anonymous and observe the development of Bitcoin?
Yes, the best option