Ethereum looks like a awesome project technically speaking, but in order for it to be long-term successful the price of the "fuel" (ethereum) that is required to run the applications *must* decrease over time to stay competitive. Thus, a long-term "investment" in such "fuel" would then be foolish. It would then be better to buy this fuel *when* you actually need it. The ethereum-devs further strengthens this fact by intentionally using clear semantics in their documents that you are a "purchaser" of this fuel (ethereum), and *not* a investor of this "fuel" in their demographics on their web-pages.