So, in order to keep our power consumption under about 2% of world wide power production, we cannot/do not want the price to get to $500,000 before era 6, which is about 2033 or so.
$500k in 2033? I'll take that. I can be patient. 
LOL me too
The math seems good, the world increasingly wants to go virtual, I don't see why bitcoin can potentially be the costliest currency.