At the end of the day, the best value of any website are the people. So I support people who are active and contributing valuable content to the community. As for delegation, I put some SP to support minnows.
The key points for investors are probably to find active community leaders who nurture their people dilligently and maybe delegate some SP if they think the community's growth would be beneficial to the whole Steemit. I think communities are the key link that made a minnow to have a chance to stay here and grow into something bigger.
As an artist, I'm quite lucky to get some support from SteemArtists, Slothicorn, ocd, and curie. Though SteemArtists does not have any real Steem power, but the people there are really great and friendly, so I feel mentally supported and encouraged.
Thank you for taking time to post about this very important issue.