You also forget Confidential Transactions. How can you do any kind of useful downstream or source analysis when you don't know the amounts and you have stealth

You also forget Confidential Transactions. How can you do any kind of useful downstream or source analysis when you don't know the amounts and you have stealth addresses? Also you can have huge amount of mixins which use the total pool of TXs ever done. It's the same as RSA4096, in theory you could bruteforce eventually crack a key, but in reality it's not a viable attack. You're just saying abstract things without backing them up with details. Also Zcoin has scaling issues with TXs being 50x of Zcash (another Zerocoin-based implementation)