It seems to me that most of the ethereum price increase is fuelled by a combination of promotion by big money and people who are not really 'believers' hoping to get rich quick on the next bitcoin.
As most of us more seasoned folks in the cryptocurrency space know, the real value of a coin/token is the community that uses it. It seems to me like a disproportionately high percentage of the ethereum community is get rich quickers who tout the advantages of smart contracts, but I have yet to have someone convince me that smart contracts are all they are cracked up to be.
My theory is that any cryptocurrency is vulnerable to the extent that its community is made up of 'get rich quickers'. For example, the bitcoin value base was built by people who really believed in it and would have continued to work with it at any price level. I sense this exists with the ethereum community as well, but my feeling is that this group is much smallet with ethereum, and that big money is seizing on it as an opportunity to pump up the value and capture cryptos potential for profit, since apparently some think it is too late to be an early adopter in bitcoin.
I could be totally wrong, and hopefully if so someone would be able to explain why.
hope you are right