There’s no need to introduce hrs and years to the mix. Watts describe precisely what you’re attempting to quantify.
https://www.google.com/search?hl=en&q=4+PW+hr%2Fyear+in+GW&o...
If we assume banks are 10% of that, then it’s 200 twh. 3x bitcoin. But also, handling literally all finance and banking in the US. Vs essentially nothing for bitcoin, compared to the scale of the us economy.
Of course it'd be much better for us to adopt a crypto currency that uses a different algorithm that has even less energy usage. Even without that though I think it could prove to be more efficient than existing financial systems.
The total amount of reported money transacted might be higher for bitcoin but that doesn’t come from contact with the real economy. So that depends on the valuation of bitcoin rather than economic impact.
https://www.statista.com/statistics/277841/paypals-total-pay...
https://www.statista.com/statistics/730806/daily-number-of-b...
The entire us consumes 75 twh in a year, the same as bitcoin’s global energy use.
Of that, the entire commercial sector is about 12 twh. That’s not just banks. That’s every company. Banks alone are surely far less. Maybe 2-3 twh? And the us is 15% of global gdp. So, global finance might consume about 14-32 twh.
Again, that is while doing all of global finance. Bitcoin powers a rounding error of transactions yet consumes 75 twh.
There’s just no comparison energy wise. My math could be off by several orders of magnitude and bitcoin would still consume more if it were actually powering the world’s transactions.
https://www.eia.gov/energyexplained/us-energy-facts/
https://digiconomist.net/bitcoin-energy-consumption