Great post! I've been thinking a lot about this too. It will be interesting to see where the community is at several years down the road. Will it still be a large amount of SP held by very few? Or will there be a whole ecosystem filled with whales, distributing wealth among communities of different interests, based on who all makes the greatest contributions to the group?

As a slight tangent, I just posted an article with a great 'how to' guide on how to buy Steem/SP in case anyone is looking to pick some up!
https://steemit.com/steem/@timcliff/steemit-how-to-invest-in-steemit-com-through-the-purchase-of-steem-or-steem-power-in-10-easy-steps