What possible reasons made Satoshi bow out from the crypto scene?

Satoshi being an individual or a group is still uncertain whether he is a male or female none can tell. But at least there was a kind of communication with the public before Satoshi bowed out from the crypto scene, this action added to the identity controversy that was already existing. Now the question is what might have been the possible reasons for bowing out?

Some say i was for security reasons as Government might track him down as seen today how cryptos are being opposed.

What reason do you think might have really caused his action?