> Soooo, buying drugs and illegal gambling? Sure, I'll give you that one.
Yes, although also remittance payments, and some usage in places with unstable currencies like Venezuela. Hard to gauge how much, though.
> My argument rephrased: "Because cryptocurrency investors have repeatedly made claims that don't pan out, we can be reasonably skeptical and concerned about their energy consumption until they actually fix it or at the very least provide peer-reviewed scientific analysis on how it will be fixed."
While that is, in the abstract, a fair argument I don't think there are actually that many examples of it in practice. Vitalik didn't claim Ethereum would be a world computer right away. He's always been clear and explicit about the scaling roadmap. I don't think the promises of the core devs of Ethereum or Bitcoin have been overstated or unmet. If you believe otherwise though, i'd be happy to listen to your argument.