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strange really, you never hear about the vast swathes of energy used by the banking sector in various server farms, banks and offices and its impact on the world, its a necessary cost for the system to run. why should only bitcoin be demonised for its necessary energy use

bottom line is things need power and that need is only going to become a bigger issue as things like machine learning and cloud gaming pick up, so rather than gripe about this or that producing xxxx waste lets just focus on producing clean energy so it wont matter

"proof of work" blockchain-based crypto-currencies deliberately waste power and continually increase this wastefulness by design over time.

bitcoin proof-of-work complexity increased 4x in 2018 alone.

no amount of renewables CAN cover this, nor should they, as it's bad design and should be phased-out for something else.

invent that "something else" and you will have done something useful.

Its not as if banks don't get any flak for what they do. Its just that power consumption is probably the least of the problems they cause.

On the other side Bitcoins biggest problem is power consumption. Which is a problem because crytpo currency doesn't add anything to society. Its just a big gambling platform. It never became the distributed money a lot of people thought it would become.