Ethereum was never meant to become a store of value similar to bitcoin. It was designed to become the tkens that maintain the Ethereum network alive. Of course that Ether has value but it was designed to be a token and not a currency. That being said, I think that Nxt is much more adequate to be used as a store of value than Ether!
I dont think so. People are saving bitcoins now and not selling them for ETH.