Not all cryptocurrencies use public ledgers. Bitcoin was the first, but it was always intended to add privacy tech - see MimbleWimble.
Zero knowledge proofs and other strong privacy protections are available on more modern projects. Some ledgers are entirely dark, granting a decent anonymity set.
How many of those cryptocurrency were created by Satoshi Nakamoto, the subject of the thread's speculation? I was speculating on the why a 3LA would have created Bitcoin, specifically.
Others like Monero also have mysterious origins. I don’t think Satoshi was behind the design even in part, but it’s one theory.
I’m pointing out that even if Bitcoin was the creation, the introduction of this concept and class of data structure is much more important and will have more lasting impact.
Surely any government agency would have considered the feasibility of new alternatives with similar designs.
Zero knowledge proofs and other strong privacy protections are available on more modern projects. Some ledgers are entirely dark, granting a decent anonymity set.