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They mean one transaction. Do the math. I did and it checks out. 300 kWh *per transaction*. Not per block. Per single transaction in the block. Yes, Bitcoin is *that* ridiculously inefficient.https://twitter.com/marcan42/status/953775357978591232 …
And saying Bitcoin uses less energy than the world's digital banking systems is... an unsourced statement. Bitcoin is such a craze, and regular centralized systems so much more efficient, that I honestly would expect Bitcoin to consume more power overall these days.
it definitely consumes more energy than all the digital payment processing, cash and gold might be another matter
i am sure that only the ATM in USA(a tiny part of global energy banking system) use more power than bitcoin. You can easily calculate this....
Let's calculate this. 1000W for an ATM is a good overestimate (it's probably lower). There are about 500k ATMs in the US. That's 500MW. Bitcoin uses 4GW of power, 8 times as much as all ATMs in the US combined. See? Math isn't hard.
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