OP, no one knows what will happen in the future because if i do i will hold a lot of ETH in my custody waiting for that day. We are only but speculators here. In my opinion i still believe that ETH is a top coin and there is a tendency it will be profitable, not because it has been stopped form mining then that means it wont be used for its purposes anymore.
With change in algorithm and rising electricity bills can mining ethereum be profitable again in the future?
This is still a big question in my mind, will ethereum return to ATH, because currently the price of ethereum is falling and with the release of ethereum PoW it might affect the price of ethereum in the future. ethereum holders should be more careful.
No doubt it will. Hopefully this year or next year. The release of the Ethereum PoW wont affect the price of Ethereum buddy. You are once scared of what will happen as an investor i understand. The same way we look at things are the negative side we should also try to look at the brighter side. The positive effect of the PoW on Ethereum.