Different strategy, really, coz I either use SBD to increase my visibility through vote buying, and every else goes to powerup my SP. Some people like to keep Steem because it appreciates differently than SBD.
If your purpose is to buy something with Steem, you can always convert from SBD later anyway. It's not always the case, but most of the time, SBD is more volatile, which means if the timing is right, I can convert them to other alt coins at a better price.
Again, it's my suggestion and opinion. :)