I’m gonna pile on the “not happy” side with environmental concerns. You see, with Bitcoin, if crypto mining was as easy as just verifying the next block in the chain, it would be easy and the market would flood. You’d have hyperinflation. The system controls the rate at which new bitcoins are minted by artificially increasing the computational difficulty of the problem. And the end result is that crypto mining intentionally wastes power output comparable to that of a country.