[hristov]

It would be very difficult to rob Bill Gates or Warren Buffet and get away with it. Their money is mostly in the records of various banks, brokerage houses, corporations etc. It would be very difficult to steal that without being immediately traced.

It seems much easier to steal bitcoin. None of the significant bitcoin thieves have been caught thus far, and we are talking large sums being stolen.

Regarding his name being uncommon, I have to admit, I know little of Japanese names or how common they are. I trusted the Newsweek article which suggested the name was very uncommon and they also kind of suggested that they checked all the Satoshi Nakamotos they could find on record. But of course they may be wrong.