> major ecological harm

This is _really_ debatable. By most measures, the vast majority of Bitcoin mining is done via renewables: https://www.iea.org/commentaries/bitcoin-energy-use-mined-th...

"Around 60% to 70% of bitcoin is currently mined in China, where more than two-thirds of electricity generation comes from coal. But bitcoin mining facilities are concentrated in remote areas of China with rich hydro or wind resources (cheap electricity), with about 80% of Chinese bitcoin mining occurring in hydro-rich Sichuan province. These mining facilities may be absorbing overcapacity in some of these regions, using renewable energy that would otherwise be unused, given difficulties in matching these rich wind and hydro resources with demand centres on the coast."

"Electricity generation in other key bitcoin mining centres are also dominated by renewables, including Iceland (100%), Quebec (99.8%), British Columbia (98.4%), Norway (98%), and Georgia (81%). Globally, one analysis estimates that the bitcoin is powered by at least 74% renewable electricity as of June 2019. Another analysis of data from 93 mining facilities (representing 1.7 GW, or about a third of global mining capacity) estimates that 76% of the identified energy mix includes renewables."

Another report: https://coinshares.com/assets/resources/Research/bitcoin-min...

"Furthermore, we show that Bitcoin mining is mainly located in global regions where there are ample supplies of renewable electricity available. And finally, we calculate an estimate of the renewables penetration in the energy mix powering the Bitcoin mining network at 73%, making Bitcoin mining more renewables-driven than almost every other large-scale industry in the world. Our renewables estimate has marginally dropped since our last report, reflecting increased levels of mining in low-renewables regions such as Kazakhstan. However, we still caution that our location estimates likely have error margins of ±5% and should be considered within that context."

Of the BTC mining that isn't on renewables, it would be interesting to see how the net CO2 output compares to diamond/gold/ruby mining, not to mention the labor exploitation.

> Except that rubies have intrinsic value, whereas Bitcoin doesn't, making it a yet worse analogy.

What intrinsic value do rubies have? They're just used for jewelry. It doesn't really "do" anything. Bitcoin is the same. It doesn't "do" anything, and its value is subjectively derived by the people that use/hold it. Much like jewelry, when it's not being used as a store of value, it serves a somewhat superficial use case, and that's censorship resistant transaction.

> I am going to take this as an exercise in aggressive point-missing on your part. If you still don't get the point, feel free to ask.

> I didn't say Bitcoin was valueless. Again, you seem to be aggressively missing the point.

You'll have to help me out here, because whatever point you think you're making simply isn't coming across. You just said "Except that rubies have intrinsic value, whereas Bitcoin doesn't...", while also saying "I didn't say Bitcoin was valueless". It's hard to follow.

> That's not proof of value.

My point about BNY Mellon, BlackRock, Square, Tesla, Canada, etc was meant to be in response to your claim that Bitcoin use is "shrinking". The entire argument here is that Bitcoin is (among many things) a store of value. Its worth as a store of value is entirely predicated on whether others think that it's a store of value. The fact that institutional investors are also beginning to treat it as a store of value suggests that it might not be "shrinking", per your conclusion.

It's also used for censorship resistant payments: https://www.coindesk.com/nigeria-bitcoin-adoption

> I'm speaking specifically of value, which again, Bitcoin has not demonstrated net value creation

Calculating "net" value creation is debatable, because different people have a different point of view on how to measure the cost (eg how "bad" the electricity usage is). But, we can talk about the output: and that it has provided an easy-to-use store of value, comparable to gold, which can be used as a hedge against fiat currency. It's being used in regimes with poor monetary policy:

https://news.bitcoin.com/venezuela-bitcoin-use-hyperinflatio...

https://qz.com/africa/1947769/nigeria-is-the-second-largest-...

You, personally, may not see any value in that, and that's fine! But we go back to the Diamond-water paradox; you probably derive more use from a glass of water (or an Android phone, to your earlier point) than Bitcoin, but utility alone doesn't determine the price/value of the thing.