Great response. The only correction I'd make is that Steem Power has nothing to do with how much you get from the upvotes of other people. That is entirely dependent on their Steem Power, not yours.

I tend to think of Steem Power as being like owning a share in Steem's future because it gives you your voting rights and influence. Steem should really only be held if a person wants the liquidity to sell or trade it.