https://en.wikipedia.org/wiki/Network_News_Transfer_Protocol
Note that the D language forums are on NNTP. For those that might dismiss NNTP as obsolete, may I present:
Bitcoin is mostly a speculative tool and what few transactions happen on the blockchain are dominated by drugs and other contraband.
Society doesn't hold together at all unless people are smacked back into line when they act antisocially. No amount of technology can change that fundamental truth; ostracism and silence are core to human nature.
I see your point - Bitcoin does exactly what it claims to do - but it is not a feasible replacement for money.
Some sort of distributed validation mechanism could conceivably be created which avoids any single point of control for a piece of content. And in fact you could use the BTC blockchain as a proof of concept - post a message with your transaction that gets encoded in the blockchain. It now becomes impossible to delete or modify. It is essentially uncensorable. You could delete it from your copy of the blockchain, but the real blockchain is the consensus of all nodes, not your particular copy.