While this is not necessarily according to the guideline you have given, I have always thought you could use Steem to generate offshore investment on stable businesses.
My main idea is about solving the challenge of housing in Kenya. Many people live in unplanned developments that lack basic facilities like clean water, toilets, proper garbage disposal and play areas for children.
As we have seen before it is very easy for people to come together and back worthy ideas on Steemit like OCD and A Dollar A Day. What if we can fund low cost housing in countries that need it while completely bypassing government bureaucracy and at the same time promoting the value of the blockchain and Steem in the process.
That is the idea I am very passionate about. Hope it catches some eyes here. :)
Make a proposal and submit it! Sounds like you have some ideas in mind so far. Refine it and make it happen.