I think Steemit is the best. It has so many opportunities for everyone, for people from every walk of life. I have seen lot of awesome communities that are there to help people grow; I also saw lot of volunteers who give their SP just to help people grow; it is very unique. I just found about another site for fundraising projects built on Steemit blockchain, that s very inspiring. I am sharing the link so others may benefit. https://fundition.io