Yes,if you power up your 1000 worth of Steem to Steem Power,your upvote is gonna increase in value so you will get more curation rewards when you upvote another persons post.
But as stated above,if you power up you can withdraw you money in 13 weeks each week getting back 1/13 of your investment so it kinda risky.
You will also be able to do a tonmore comments and upvotes.
If you are in it for the long run,it's all good.
But never invest money you can't afford to loose.
That's it.
I hope I helped you with your question.