I don’t believe Gwern lives as frugally as he’s described in this (if this even actually is the real Gwern). I’m 100% sure that he has a persona he likes to portray and being perceived as frugal is a part of that persona. When it comes to answering the question “who is gwern?” I reckon Gwern’s a plant a seed in people’s mind type of guy, and let them come up with the rest of the story. Still, I like a lot of his writ…
I believe him.
I’m willing to bet he became a millionaire thanks to bitcoin.