To be honest, I think that putting it into SP is always the best (at least for now) unless you have so much that you can afford to play along with the big boys and buy / sell with the tide. I was holding my SBD wondering what to do when I could have traded it 1.7 to one. I decided that as long as you get more Steem than SBD, then you are winning, so made a decision and sold the little I had at 1.2 to one for Steem and powered up. I'm worried that the SBD might go back to being $1, but Steem may never go back to $1. Then it will cost more SBD than the Steem you get for it. Think how hard it is for a newbie to grow if every Steem costs 4 SBD or more!