Unless every single coin major coin makes the switch to PoS or other non PoW consensus mechanisms, I don't think mining will be going anywhere any time soon.
~ 17 280 eth mined daily, ~ 15 Million dollars daily. I think we would feel that dent.
Right now it's 210 Th/s on the eth network, and you need 34 000 rx polaris for 1 Th. Those gpus will search for a home.
How many gpus are mining shitcoins, that would be nice to know.
Nah, you need one coin to move to pos and we are out of businesses, and thats ETH which their POS is in testnet, all other coins combine doesnt have 20% of gpus that ETH have.