It would be interesting to see something like an account balance for every steemit account, where one can see, how much steem someone has transfered outside of steemit (sold) or how much he has transfered to steemit (buyed). In my case it would be 0, because I have powered up with all the Steemdollars I received so far and did have never sending steem out or in. - I would like to vote for users that are powering up all their received Steemdollars or have even bought some steem outside and transfered it to Steemit for powering up.