Hello,
I was just reading this article
https://bitcoinmagazine.com/articles/new-digital-currency-zcash-promises-total-anonymity-and-privacy-1455720144
So basically this is a new way for rich people to hide their unwanted transactions...for example bribe. Companies, politics etc...
Because why would you need privacy? Now with fiat and banking youdo not have it. And its hard to bribe someone.
Maybe you guys know why it would be good to have your transations private

Ps: your wife will still find out youre cheating