What? I was replying to someone who explicitly referenced the Bitcoin whitepaper, they were clearly talking about BTC. And the protocol from the whitepaper was actually pretty bad, from a cost and transaction time point of view. It's gotten a bit better with some hacks layered on top of it.

And yeah, the thing is, payment systems that work approximately as well as BTC exist without being cryptocurrency and using up so much electricity on mining. The main difference is that they don't operate in some areas where BTC still can (like evading sanctions, like this), and the speculative nature of BTC (which is actually a net negative on using it as a cash).