He know governements probably want to kill him or want him to work for them so he take the risk to be forgotten forever as a legend.
Imagine what he was able to do in 2008 already, when no one in world have the power to change the world, he was the one to believe he was able to start the revolution alone and change entire world by himself.
Nothing, he predicted everything perfectly, he will comeback one day i think he is already back but to crazy like 10 years ago no one believe him already.
But there is a very low possibility that genuine satoshi will show up again for the reason that bitcoin became very demanded because of its anonymity.