A couple of things though, if superNET goes down, none of the coins involved will go down. Each coin is still its own independent blockchain.
And any smart coin community will focus on adoption. I believe that's the most important thing. SuperNET shouldn't hinder adoption in anyway, just provide access to services and technologies that are available.
The price of BTCD, NXT and BBR is higher at the moment is that if you pay for Token with those coins, you get 5% discount. So people are buying those coins, which increase the price of them. If superNET goes down, or ICO finishes, then the price of those coins will come down.