Best post I read on here today.
I don't have any numbers, but what are the annual maintenance costs of the current fiat system in comparison? Probably not 9% like with bitcoin today, but definitely not zero either (banks, vaults, security systems, ATMs, personnel, printing bank notes, minting coins, credit card fraud, insurances etc.)? Sum it up and you will know how many more halvings until break even. Just a thought.
Don't forget prisons and police as part of the cost.
I actually don't fear the power cost/difficulty = bust .
I do fear lack of demand due to public's perceptions of BTC = low price = bust out.