What happens if Bitcoin or ZCash change value X, Y or Z?
You said that you will never build on a platform you have no control on (ie: NXT) but is not BTC and ZCash out of your control?
1) What happens if btc transaction fees become large?
2) Or BTC changes in a way that is disasterous to your project?
3) Or z cash fails to deliver a working product, or zcash delays their
launch, or zcash who can read this thread sees you as a competitor and
seeks to throw a monkey wrench in your launch somehow.