This seems to be a property mostly of the original BitCoin. The later cryptos, including BitCoin Cash, use less energy overall and less per transaction. The comment about purchasing a latte with BitCoin is a bit misleading, as I don't think many cafes accept BitCoin and I believe most BitCoin users either use it as a store of (speculative) value via buy/hold (or "HODL to the moon", as they call it) or for occasional illicit transactions. I would be surprised if there are any but a few crypto extremists who spend tiny bits of their precious crypto on minor inconsequential daily transactions. Most are all about maximizing their store, believing in an eventual Bitcoin dominance, or trying to profit by timing peaks & troughs of the wildly fluctuating crypto value.
All the later alt-coins use improved technology and have lower costs (by design), some of them extremely low compared to BC. I don't know, however, how the lower ones would compare to a standard credit or debit card transaction for the same amount. They might still have more transaction cost even in the best case.
Having read the originating report, it's not clear to me how much of the "transaction cost" is a marginal cost and how much of it derives from the huge (and growing) cost to mine (mint) each marginal BitCoin added to the overall supply. BitCoin was designed to make mining further coins exponentially more expensive as a way to cap supply at a set or asymptotic ceiling. So this high energy cost is, in a way, a "feature" rather than a bug, one that has run perhaps far beyond what was originally envisioned by the mysterious BitCoin creator. The idea perhaps was that cost would exceed rational desire to mine more coins, but underestimated the power of greed to ignore environmental (or financial) costs in search of gain. This mechanism then trickles down into the embedded cost of the resulting crypto, as well as (I think) making the transactions themselves highly consumptive of computing power due to their ever-growing chain of verification. I can only imagine this is worsened when a single BitCoin, now worth thousands of dollars, is spit into myriad tiny millibits or microbits or satoshis (currently at 17 to the US penny), each carrying the full blockchain or identity trail of the original BitCoin from which it was split.
The cost is indeed astonishing, although I have to wonder what the comparable cost is of various more traditional currency-based transactions, the vast majority of which are now done digitally, in the developed world. I wonder if there is analysis of the footprint of credit, debit, or PayPal/Venmo transactions. I'm sure it's far below BitCoin but where does it sit vs. Ethereum 2.0?
Erich.