Quorum is business blockchain. Most business blockchain have no coins. They don't need coins or mining.
BTC was sold by talking about the greatness of blockchain. There are many application that run on blockchains. Some good some very bad. BTC is is VERY BAD application built on the good technology of blockchain. Many ICOs fall into this VERY BAD category.
In other words, blockchain is like the Android or Windows on your phone or device. Bitcoin is a malicious app built on that platform.
Now, folks please get out of hangover of "blockchain s great and so is bitcoin". They are entirely different.
JP Morgan Quorum is perfectly valid for their business case. It has nothing to do with any other silly coins.
I heard Vitalik is one of the smartest guy in this field. Even for him, ethereum has some issues. Then, what did make except the hard fork? I don't get it if they are not the originator like satoshi nakamoto.