Likely not profitable. If you already have some surplus free electricity and free hardware, then yes by all means, you should be mining with it. But even when

Likely not profitable. If you already have some surplus free electricity and free hardware, then yes by all means, you should be mining with it. But even when electricity is free the economics on new mining hardware are often uncertain. I don't know what the long-term price of cryptocurrencies will be, but I strongly suspect that right now is a bit of a bubble. I'm pretty sure the return will not be like $5 a day on a standard gaming GPU a year from now. And Ethereum in particular is moving away from proof-of-work consensus entirely, so the long-term future of mining is questionable really.