Not sure if you are aware, but not all crypto is based on proof of work (mining). There are other algorithms that don't waste tons of energy and still provide the benefits of crypto. Also, they can be useful for things other than tax avoidance and illegal utilities.
You can’t generally send EUR anywhere in the world for free in seconds. You can’t pay for things in EUR with 0 fees. There are some crypto’s that can do all of those things.
