I've invested a small amount of BTC in Steem Power, but I haven't been using the Steemit platform in a way that rewards me, so I haven't earned anything. I read articles and upvote the ones I find interesting, but I haven't gotten involved in any discussions. I guess that's where the incentive for curation is.
There is a lot of good content being posted on here, but also a lot of reposts/plagiarised articles that dilute the overall pool of available content.
Back to your question - if/when I do earn Steem Dollars, I'd probably convert back to Steem/Steem Power while the platform matures.
I second Crypto's comment. Write something! Ill be waiting!
It does not hurt to try and you will never know unless you actually try :P
You really need to try writing something, it doesn't matter what... just try and see the results. Then if not happy try with something else, then again and again... I did a lot of trying myself already :)