I mean, I might buy a little just to hedge in case I'm wrong, but honestly - this is the first time in history that the integrity of both math and technology directly underpins an entire economy (well besides when paper currency was first introduced).  This isn't HTML5 or Flash that we can laugh about when we find a 'game breaking' bug.  
  
This is supposed to be the foundation for an entire monetary system, and even if it were a public blockchain and failed - that would be disasterous.  The fact that it could theoretically fail and no one would ever be able to know?  It makes it a ridiculous unacceptable risk (even aside from the Genesis keys nonsense).  
  
Monero with confidential transactions features time tested cryptography and is superior to Zerocash.  As a high-level amateur, this is the advice I would give to any serious institution considering making an investment into this fancy new "private blockchain tech" of 2016/2017.  I can't imagine that a more competent mathematician or programmer would advise any differently: "Yeah JP Morgan, so I know you're all hot and bothered by this new ability to write to a blockchain and keep it private, but I strongly recommend you go with this brand new math combined with a brand new implementation we just invented for your billions of dollars worth of accounting / asset holdings."  
  
The only way that happens is if a competent authority comes out with a firm statement that "ECC is completely broken, we have broken it using our new machine and here's the proof, everyone upgrade to this new Quantum-proof method that was created in 2016 or else." and I put the chances of that happening at a very slim percent in the next decade (or two), despite the NSA's recent warning.  Of course, I'm frequently wrong so who knows what will happen.