Quote from: dothebeats on November 30, 2017, 03:52:04 PM

No, that is total bollocks and utter bullshit on her part. That is exaggeration at its finest to make bitcoins look awful compared to other traditional payment systems. If that was the case, do you think miners would still keep on mining if a single transaction would be that expensive to hash? No, absolutely not. As of this writing, bitcoin's transaction per second is set @ 4.64, so this girl mean to say that in every second, bitcoin farms are burning 1392 KWh of energy for 4 transactions? It just doesn't add up.

Global hashrate: 11 500 000 TH/s.
Considering the average miner the S9 14 TH/s.

We have around 800 000 miners.
Energy consumption : 1375W. Let's assume a PSU with 90% efficiency and we get around 36kWh.
Since we're seeing 300k transactions that would lead to something around 100kWh per tx.

BUT.
And this is the biggest but, I haven't considered power at the wall, I've done the numbers with almost the best miner available, not added in cooling and ...bitcoin mining is highly profitable right now.
We are going to see another wave of miners hitting the markets pretty soon. (more power consumption / unfortunately same tx numbers till LN).