So you've never observed that things go in cycles?
In your universe everything remains static forever?
Human stupidity and foolishness will persist until the Lord returns.
My opinion of these mining activities was fairly well expressed. They are a variation of get rich quick: get rich by neither working nor producing goods and services. If they were ever productive in any way (say if the problems solved were those people were renting time on the network to solve) they’d probably die on the vine eventually rather than go on and on merely consuming resources.