one can say it has a fundamental value of zero.

but reality is it has a real utility value in managing the world wide grid.

It it a great tool when a wind farm generates 10mega watts an hour and demand is 4 megawatts the extra 6 megawatts need to be shunted somewhere.  Say a nearby btc mine.

And when demand increases to 6.5 megawatts an hour the mine can back off to 3.5 megawatts.

Miners are a really good resistive load.

Secondary purpose is hear generation in the example above quite a bit of heat will be produced by this miners and it can be fed into heating grids.

dollar nope
euro nope
gen nope.