I read an article that one guy/gal only mined in the winter and did it on a level to offset heating cost or some crazy **** like that.I'm long on crypto with the caveat being that I'm long on Proof of Stake winning out vs Proof of Work (ETH, BTC, other traditionally "mined" cryptos). Mining isn't sustainable. Period. When it takes 800kWh to process a single transaction that isn't remotely sustainable. BTC is lucky in that it was first, and has garnered the most press and thus benefits from early adoption. Cheap gains are easy and thus BTC and ETH are winning in the Market Cap sense but that's borrowed time as far as I'm concerned.
Ethereum is considering a hard fork away from Proof of Work and moving to Proof of Stake similar to coins/tokens you are seeing now like Cardano/ADA, Helium, Figure, etc...so I'd be heavily considering moving into proof of stake based networks where you are rewarded for staking your coins on the network/ledger. FWIW I'm long on the ADA/Cardano train but there are several coins that offer very competitive returns that make traditional savings vehicles look more stupid than they already are.