futurethinker is right
But even if the steem price does not drop, what about the 15% return? What's the economics behind it?
Also I have to appreciate the isteemd service as on of the best made here on steemit we have to look at the basic economics here.
So the APR should attract institutional investors. They delegate their voting power to you. You upvote whatever people are paying for.
By this there is ZERO economic value generated.
If you are successful and more and more investors target that passive income, less and less relative voting power will stay with those reading, curating and posting real content. So steemit profits only by inflow of fiat from the new passive investors into steem tokens and as soon as this ends it will all fall apart... This will just be the ultimate nail in the coffin.
If you find a way to offer differentiated pricing for your voting services in regards to the value of the content voted for this should be much better.