I was thinking about my own use case to add to this: I would use a privacy coin like ZCash to anonymise my tracks trough other crypto currencies. Would that be a valid point ?

I also came across some interesting news: JPMorgan’s Quorum Integrates zk-SNARKs For Enhanced Privacy, about the zKSnarks technology behind ZCash, which is just a kind of validation of it I think, as in open source projects I am not sure there will remain a link between the 2 businesses. Project Alchemy and Quorum would be some example of the community's openness to share and test technologies.

One important aspect about the token is that there will only be 21 million Zcash similar to BTC. Zcash Mining these days is quite lucrative, one of the few big currencies rivaling ETH for mining power.