Similarities and differences between bit gold and Bitcoin, plus a great thread with many early ideas: https://unenumerated.blogspot.com/2011/05/bitcoin-what-took-ye-so-long.html …
Yup, bit gold didn't have difficulty adjustment or cap, thus in the blockchain ("titles") non-fungible. Relied on exchanges to create relative prices thus allow creation of fungible notes (a 2nd layer). Has monetary benefit but Bitcoin/Lightning combo is far more trust-minimized.
