No one thinks crypto will magically rid us of corrupt governments but if they got us by the balls with banks and trade, then we can't make a step in the right direction.
Is cryptocurrency free from those banks and trade? It seems like its liquidity is what gives it value in the first place, and those institutions are in firm control of where it can be liquidated. Not to mention that the old financing world has been investing in cryptocurrency too.
Just to clarify, your first sentence couldn't be more wrong. Varoufakis is a Marxist-style activist who has dedicated his life to advocating for placing power in the hands of regular citizens and taking it away from those who currently have it.
The utter misunderstanding is something I imagine comes from the fact that in this particular article, he's critical of the particular ways that cryptocurrency movements are shifting power. He doesn't think they are shifting it in a useful enough way and is skeptical that they really will end up shifting it much at all.
I mean honestly though, I'd rather the banks have me by the balls than some random unaccountable crypto whale I've never met have me by the balls. At least with the banks I know who to be mad at if my money gets crushed.