I’m guessing it’s implied that the return would be higher than $75m a day.
Thanks.
"unsustainable"
now it says unstainable
Also true!
Depends what the goal is. A state that wants to break the anonymity of the system doesn't care about $75m per day, specifically a state that can just print that...
I'm not familiar with Monero's privacy system, so I can't say for sure, but it is very, very unlikely that a reorg could in any way break anonymity.