Satoshi Nakamoto has good reasons for being anonymous.

He was probably a leading developer in PGP. The government most likely threatened him with the death penalty for treason. He was creating something the government couldn't hack, and therefore an enemy of the state. They could have tried to force him to introduce a back door. Assuming he complied by proposing some obviously weak code, his peers spotted the holes and shot it down in flames.

Most probably tax audits followed coupled with the freezing of his accounts.

It's not surprising his next project - bitcoin - had to be anonymous.
Despite his attempts at appeasing the NSA, FBI and other agents of the state, he then got