There was a big announcement by the SEC. Ethereum is not considered a security. This is a big deal because it gave some clarity that Bitcoin and Ethereum are not securities. So, for now the SEC will not be regulating them as such. Most ICO's are done on Ethereum, but some ICO's methodology may be considered securities depending on their function. The ICO market may be a little gray, but at least for now, investors and bigger institutional money won't have to worry that Ethereum may go under for violating the securities laws.
A big part of the debate was decentralization. Since Bitcoin and Ethereum are decentralized, it is not as though one has shares in a "central" company.
The price had a little pop yesterday and is down now for Ethereum, however, this is the beginning of a step in the right direction and may give institutional money more confidence. The fact that we got some clarity from the SEC finally gives people some trust in the potential of the marketplace.