When antminers turn off, difficulty lowers, wouldn't that vest time to mine is when everyone else is turning off there's?
Nope, wishful thinking. Thats the same thing people said when ASIC's were introduced. "When the GPUS' are turned off the difficulty will flatten out." That never happened. Just look at the hashrate historical record.
When antminers are turned off, faster and more powerful miners will be turned on. That is probably a more accurate statement. ;-)
Actually power efficiency will become more and more important. GPUs were turned off or switched to junkcoins, but the problem is the entire GPU world is probably a couple of antminers in power :-). My curiousity is that the new generation of miners is going to be about 4 times as efficient as my 65nm technology, which will buy a few months but that's it. Then what?
Oddly enough what is happening to Bitcoin is what's going to happen to the universe in a heat death scenario. In a few billion years when we're huddled around the last of the black holes for energy we will be getting about 500 watts per km tops. Not enough to make a good bowl of popcorn; how are we going to keep the blockchain going?
C