That's still up to you. But if you were PLANNING on fully "Powering Up" your post anyway, then yes, you can go to the STEEMIT market, BUY STEEM with your STEEM DOLLARS, then "POWER UP" your STEEM from your Wallet.

Once you're done, you should end up with a bit over 25% more STEEM than you would have otherwise (based on the current rate of SBD, which is back down to around US$1.55 now).