It's not about today, but tomorrow. Inefficiency is way easier to fix than break paradigms. How much it spends per transaction now isn't that relevant.
I don't know if you're serious, but you can't make proof of work more efficient, nor can cryptocurrencies realistically get even close to the transaction capacity of current "paradigm" (banks). This won't ever change the paradigm. I fear you may be misinformed about where Bitcoin is headed.
I get you, though, I was also in it for the technology (as well as the profit, but I got in back when the "bitcoin faucet" gave away mined bitcoins freely, and I spent like 2 whole bitcoin on socks, there was no investment scheme in the beginning), but it has since become clear that this system can't be more than it currently is: an investment scheme that only works so long as more people put money in.
It will take another paradigm shift, as big as Bitcoin was compared to the "paradigm" before 2009, before perhaps someone proposes something that has all the beneficial properties and actually practically works (regardless of energy efficiency).
I get you, though, I was also in it for the technology (as well as the profit, but I got in back when the "bitcoin faucet" gave away mined bitcoins freely, and I spent like 2 whole bitcoin on socks, there was no investment scheme in the beginning), but it has since become clear that this system can't be more than it currently is: an investment scheme that only works so long as more people put money in.
It will take another paradigm shift, as big as Bitcoin was compared to the "paradigm" before 2009, before perhaps someone proposes something that has all the beneficial properties and actually practically works (regardless of energy efficiency).