Text from Princeton Bitcoin Textbook:
To create a free-floating digital currency that is likely to acquire real value, you need to have
something that’s scarce by design. In fact, scarcity is also the reason why gold or diamonds have been
used as a backing for money. In the digital realm, one way to achieve scarcity is to design the system
so that minting money requires solving a computational problem (or “puzzle”) that takes a while to
crack.
Another similar proposal, by Nick Szabo, is called Bitgold. Szabo says he had the idea for Bitgold as
early as 1998, but didn’t get around to blogging about it until 2005. The reason I mention this is that
there’s a minor conspiracy theory popularized by Nathaniel Popper, a New York Times reporter who
wrote a very good book on the history of Bitcoin. Popper notes that the blog post timestamps were
changed after Satoshi posted the Bitcoin whitepaper so that the Bitgold proposal looks like it was
written up about two months after Bitcoin was released. Popper believes, like many other observers,
that Szabo could be Satoshi, and he cites the timestamp change as evidence of Szabo/Satoshi trying to
cover up the fact that he invented Bitgold before he knew about Bitcoin.
Next, we might ask ourselves, “What did Satoshi know about the history of ecash?” To understand
this better, we can start by looking at what he cites in his white paper as well as the references that
existed on early versions of the Bitcoin website. In the white paper he cites some papers on basic
cryptography and probability theory. He also cites the time-stamping work that we saw earlier, and
it’s very natural to think that he based the design of the block chain on these references since the
similarities are so apparent. He also cites the Hashcash proposal whose computational puzzle is very
similar to the one that’s used in Bitcoin. He also has a reference to b-money. Later, on the website, he
added references to Bitgold and as well to a scheme by Hal Finney for reusing computational puzzle
solutions.
So i think we still follow the Root of Satoshis Vision