Dividing a large and growing community into three distinct categories - minnows, dolphins, and whales - is problematic for several reasons.
Instead, what you see is that there is a large variety of species, all across the spectrum. There are whales that eat plancton, whales that eat fish. There are whales living only in certain areas, while others traverse the globe. Likewise there are steem-whales that don't post, and steem-whales that are very active. There are steem-whales who only upvote posts about #steemit, or #marijuana, or #any-other-tag, and steem-whales that vote on a large variety of posts. There are steem-whales who vote a lot (I'm talking to you, @berniesanders), and those who vote very selectively. The same can be said for the so-called dolphins and minnows. Some are here to please the whales, cleaning their teeth, or scrubbing their back. Others are more poised to find their own voice or niche and create something beautiful there.
Look at these fish:
Do they look like they just exist to please others?
Hell no!
They are there to shine, to bring forth their best self and to procreate amongst their own species. None of them is trying to mate with a whale. These fish know what is best for them. Just like you know what is best for you. This means that within the Steemit ecosystem, you have to think about what you want, not about what a whale might want. Please be yourself.
This picture is wrong. The Killer whale is at the top, but the Killer whale is not immortal. They, at some point, will die, their bodies eaten by those at the bottom. It's the circle of life, baby (cue Elton John).
But, more importantly, the whales cannot exist without the krill, without the web that supports the whole system. Every species has a specific and useful function, that supports the entire system. You have a voice that is important to steemit and this will be recognized, first by those most affected by it, then by the bigger players who are affected by those around you, and finally, it disperses throughout the web of life. When you say the things that are valuable to you and to your direct environment, it will be rewarded.