How many times is "every"? I count maybe a dozen countries, they were either puppet states of the soviet union and didn't have much local control or they were authortarian dystopians both before and after communism.
Maybe the pattern is toltalitarian countries are going to be toltarian regardless of what they call themselves.
As far as crypto goes, there are like a billion different variations on the idea, most are scams, and i dont think i have ever heard anyone say "real crypto hasn't been tried" before this.
It sucked in Russia, Cuba, China (until Deng made it capitalism).
Australia, Sweden, Norway have been much better examples. Though their secret has been to not call it Communism/Socialism but instead something like "liberal democracy" or "democratic socialism".
Agree there is propaganda war that has been waged to ensure communism looks bad... which is why it's potentially a good parallel for crypto, as I think (potentially even literally not just metaphorically) the same vested interests are against it.