Which is why, almost tautologically, it doesn't matter the power expense of blocks or even individual transactions. If a micro-coin becomes possibly promising,

Which is why, almost tautologically, it doesn't matter the power expense of blocks or even individual transactions. If a micro-coin becomes possibly promising, someone will dump 12gW into it a year until the consumption matches it's appreciation. May as well have the work be useful or artificially difficult for good or better reasons.