First, thank you for taking the time to write such a long and exhaustive post and sharing your opinion on those topics.
To give my 2 cents: for the most part every socialist country's doctrine of socialism has been twisted by their leader and therefore deviate in some cases quite a lot from Marx.
And personally I think that one of the main problems of capitalism(and maybe other political/economy systems) is actually the over centralization of the country/state therefore causing people not to think in terms of other people(fellow citizen) well-being, but in terms of numbers and faceless names on a paper/computer( think about Stalin/Hitler sending hunderds of thousands people to death/work camps most of which they never even saw/talked to/met etc or the more modern version - politicians or clerks predetermining the fate of many fellow citizen which again they havent met/talked to nevr by pushing various laws).
So I believe decentralization is the cure for a lot of the problems - because it has been proved that when you know someone or think in terms of a real person when you take action its a lot more harder to do them harm even in indirect way.I think the only truly decentralized country nowadays is Switzerland and they seem to be doing pretty well.
The connection between decentralization and cryptocurrency is one of the things that made me interested in them few weeks ago. :)
Cheers,
Dany.