For now, we don't really know where steem is heading, but it's definitely on the uprise!! It's difficult to predict what's gonna happen in the coming years, so I'm holding a bit of everything!! Whatever i get in steem power, I'm NOT going to power down. And usually I like to keep around 10 Steem dollars in my account, and whenever i'm significantly above 10, i'll convert the additional dollars to STEEM (not steem power, because i'm getting steem power from post payouts anyway).
So it's kind of about having a balance between these three. But my preference is to have a bit of everything!!
nice, I was converting every cent of Steem dollars into Steem power...
I would suggest to still keep some in SBD to use for the upvoting services once in a while :) Maybe around 5-6 SBD should be enough, depending on the frequency of posts you make.