The price of Ethereum has far less to do with its long-term prospects than projects like Numerai.
Marc Andreessen made the famous statement that "Software is eating the world." The trustless digital scarcity enabled by blockchains has opened up a whole new part of the menu. Due to Ethereum, Machine Learning can now start dining in earnest. ML is going to gobble up everything that Oracles expose.
As an aside, people often conflate AI and Machine Learning; they are (extremely likely) related but different. IMO most people erroneously plot the singularity using ML advances. I think the jury is still out on their relationship, even though I suspect ML might be a possible path.