While being right about crypto being meaningless for some people (I guess there are people valuing hope in decentralized monetary system, even if it is misplaced.), you failed to mention that most of other industries are equally meaningless and good part of them are even harmful: fashion, fast food, industrial food, banking - in a way we have it, cars in current form(no need for this huge tanks)...
In comparation crypto is just wasteful and isn't harming anyone.
There are also gravity batteries: https://www.euronews.com/green/2024/02/06/this-disused-mine-in-finland-is-being-turned-into-a-gravity-battery-to-store-renewable-ene
Also in Finland, but different technology "sand batteries" https://www.bbc.com/news/science-environment-61996520
While I think there is still no working production model, Iron Salt Batteries are very promising https://en.wikipedia.org/wiki/Iron_redox_flow_battery
There are different options, not each one is suitable for every place, but seams possible that combination can help us achieve needed reduction in fossil fuel usage when sun is down and no wind.