I have always heard that there were discussions, debates, papers, etc. wherein the inventors of the internet early on (in the 80s, even 70s) recognized that a protocol for money built right into the internet was a good idea. But... where is the evidence of this? Where are the papers? Who were the computer scientists discussing this?

Does this rumor come from a book? Who said they were discussing a native internet currency that early on? Where are the receipts?

And further, did they actually say it was because of the Byzantine General's Problem that this was impossible at the time? If anybody can point me in the direction of some sources for this idea, I would greatly appreciate it!