Reminder that the real Satoshi has known Bitcoin addresses, including some that have a huge amount of coins, so all he needs to do when he is ready to come back into the public world is to sign a message with the associated private key.

Remember this is an expert on cryptography he's not going to lose his old keys. Of course there is a chance he's passed away but anyone ALIVE who is claiming to be Satoshi should be disregarded until he signs a NEW message.