Not necessarily, if the bitcoin price will raise until reach something like that 10k dollars the mining will stay *competitive* but no one know what will really happen (because no one knows the future).
That's true I never looked at it that way you have a point there. The only thing is if the price reaches $10,000/Bitcoin That would mean:
0.1=$1,000
0.01=$100
0.001=$10
0.0001=$1
Who's to say that bitcoiners as a whole decide they don't want to pay $1 every time they send a tx considering the fact that many tx are <$10 this would mean they would be paying 10%+ to send that transaction. So the standard tx fee is lowered to 0.00001 or even 0.000001 $0.10 and $0.01 respectively. This would mean a normal block with ~800 transaction wold only be worth up to $80 and as low as $8. this most certainly wouldn't be worth it to mine with todays hardware. Which I know we are a long way away from this happening but still I can't seem to fathom any bitcoin mining equipment able to operate and POI with those numbers and paying for electricity
You are assuming that in a hundred years or so, the ASIC technology will be the same as now and the electrical rates would be the same. Bitcoin will certainly increase in price after sometime. ASIC technology will continue to improve overtime and the cost of making the ASICs would decrease. With the introduction of renewable energy sources, the electrical rates would also drop. This would improve the chances of ROI for miners.