Yes there are ways to audit monero supply looking for a price fall is not one of them lol. Anyway exploits should be detected before they are used not the other way around like the ones that happened on Bitcoin on 2018 or the ones that happened on Monero before.

In order for a transaction to be accepted by consensus rules, it has to prove that the sum of its inputs and outputs are zero. There is not a way to cryptographically sum up the entire chain.

This is cool. Where did you get this information about summing up with bulletproofs? Thanks.