Just like bitcoin has become a store of value instead of a currency for your daily shopping i see that the same can happen to ethereum to in the near future because obviously ethereum is the second "biggest" and bet known crypto out there.
But i don't think that this is the vision that vitalik had and has for ethereum. Because of it's smart contract functionality it has a lot of features that can be built upon and ethereum can be much more than just a asset that is stored and never touched in your wallet.