On 4-5 Aug there will be an eth fork, which will burn gas fees which so far were going to the miners. How much it will affect mining profitability can't be predicted. May be 40%, may be more. And POS is scheduled for December this year. The remaining POW coins can't handle even 1% of the eth hash power, so the profit will be only for those having very cheap or free electricity. The big mining farms are preparing to shut down and soon there will be a flood of thousands cheap gpu's. The prices are already falling, and I guess around December the gpus will be > 10x cheaper. Not a good time to start building rigs, I guess. Still, I see quite a few newbies doing so, apparently not having a clue what will happen soon.
that's interesting. I tend to agree generally. last time I was adding gpus it was 5700 about the time it got released (and maybe it was good time to add more).
now its all unclear yet again (as it always been - no guarantees) and pos is coming for real. but what % of pow would be used for eth and for how long... and if eth would be above 10K... also there other chains that may use POW (and who knows how it will works and how much need for "POW enabled trust" will be required ), there many ifs...
also profits are good, better than the most of the last 5 years in fact(in fiat terms) or what?