Wow, that is a significant downside to bitcoin compared to fiat currency-electricity usage... That would probably be a reason, if bitcoin never goes mainstream, why it doesn't. Too much usage of electricity...
Hahahahahaha... yeah right. Have a think about gold credit cards and banks... bitcoin 'could' potentially replace all of that with one network...
Bitcoin pales into insignificance when held up beside those three.
Electricity stopping bitcoin going mainstream?? I really really doubt that.