With change in algorithm and rising electricity bills can mining ethereum be profitable again in the future?
Don't know what made you ask about Mining ethereum when it wasn't available in our time now , and aside from that Mining is too expensive than its better to buy and hold.
though there are also available like what said above is staking so choose what to do or choose what best coin to change than ethereum.
and also like what I said? best to Buy ETHEREUM than mining as it is not available to mine now.
I remember there are some ethereum forks that you can still mine if you want to, even basically the same coin with different chain was handled for a while but didn't work. ETH is great coin to buy and hold, and it is even better to buy and stake as well, which would make it actually pretty decent thing to do and I would be highly in support of it.
I am not saying that it would be a terrible idea or anything like that, but it should not come off as a surprise to anyone that ETH is something that will be around for a long time so trying to make a short term calculation for it seems like a mistake in the end. I highly suggest making a very long term investment on it.
indeed it is better to buy and hold but Mining those fork coin? I'm not sure if this is literally a best interest for wanting to mine.
I would rather buy Ethereum and keep holding than doing such action that maybe more riskier than buying.
mistake will keep coming but never allow this to happen when you have a choice .