What you really should do, if you are willing to wait, is let your Steem Power compound for 5-10 years before powering down. If the current interest rates hold up at least until Steemit reaches market saturation, you will start accumulating some crazy amounts of Steem! (In the millions!) If you let it sit there for a decade you can go buy yourself a small island full of supermodels to retire on. At least that's my tentative plan:-D