Bitcoin is the robust medium of exchange and store of value that ETH can never become. This has been shown by the various hacks it has undergone. Note that most bitcoin hacks have been on exchanges or due to losing private keys. There hasn't been a case of bitcoin's code being exploited.

Ethereum on the other hand has had quite a few screw ups where the code was exploited. Notably The DAO hack which prompted the centralized controllers of ETH to actually do a hard fork and breakup from the past. This shows that ETH is a centrally controlled coin and for all it's benefits, the billionaire investors wouldn't like to hold their money on something that another organization can change.

The next reason that ETH cannot have the same value is the ICO craze. The scam devs of ICOs are increasing the demand for ETH by asking for it in the smart-contracts. The raised ETH is supposed to be of two uses:
1. For Cash requirement by selling on exchanges
2. Using as Gas for running the Dapps on the network.

Several of these devs are deploying their own networks so they won't use it for the second purpose. The only remaining purpose is to be used for fulfilling cash requirement. That is why you are seeing concerted shilling from media and trolls. The devs who need to cash out will sell it on exchanges causing a crash of prices. Those who FOMO now into ETH will learn their lessons the hard way.