> “Within our present oligarchic, exploitative, irrational, and inhuman world system, the rise of crypto applications will only make our society more oligarchic, more exploitative, more irrational, and more inhuman.”

Varoufakis assumes the current world system will continue to apply but on the scale of human history the current world system is a novelty and there is no reason to expect it to be stable in the long term.

True, the current system needs to create money at a whim so it doesn't want to bitcoin to flourish. It also needs to print money so it can't exist if bitcoin flourishes.