There is no such line. The actual line is whether someone is newsworthy; the safeguard you have against journalism abusing random people (which it has done, often, over the last 150 years) is that journalists ordinarily don't write intrusive stories about random people.
(There are some other safeguards, but they're highly situational.)
The conflict between journalism and "doxxing" is a Redditism that people are frantically trying to import into real life. Maybe Reddit norms will upend the longstanding norms (and purpose) of journalism! But nobody should kid themselves that the norms have always been compatible.
I agree, in that Journalism has always been an unethical business masquerading as moral imperative.
But I think this "Redditism applied to real life" is actually society grappling with the ethics of public safety and social accountability in the 21st century. Is it okay to dox a 16 year old Twitch streamer? Or a wealthy Satoshi? Or a crypto-Nazi? Laws only define so much, and we (society) have to fill in the gaps, which is messy. I think we're figuring out where the line is in real time.
But are they themselves newsworthy or is it what they created and that they hold a lot of coins?
There are many people, both FOSS devs and working for major corporations, that have contributed or singularly been responsible for very impactful technologies, but in general, if that person wants to keep their persona discreet and there is no evidence they have done anything of public interest, the reporting remains purely on what they have done. Akin to why Wikipedia generally has rules for notability (I’d argue Satoshi falls under ONEVENT if we are strict here).
To me, the way you describe it, the line appears to be less in whether there may be a public interest and more whether there is public attention. In other words, is the line in the sand whether people should know this or whether they want to (and thus buy copies)?
Genuinely asking, is there a rule set on this the NYT should adhere to? What is the APs position for dem asking a pseudononymous character only notable for a specific thing?