Well, yes you can rent.
Whether it's worth it? That's a personal thing.
I bought my points in 2000 and had a wonderful time using every single point that I decided to add on in thoughts of upgrading usage for a future family.
In 2003 I had a personal situation that prevented me from using all my points. So I've resorted to renting out most of my points and luckily found out that the experience was quite rewarding for both parties (myself and the renters).
And now I still occasionally rent some of my points if necessary.
This year we are planning a european trip instead of our twice yearly disney trip. So instead of banking them I decided to rent them out. And again I've been lucky enough to find great renters...
I don't buy extra points to rent out but every now and then I decide to go somewhere else (cruise, europe, NY, etc.) that I know it'd be wiser for me to rent them out than to keep banking them.
Plus when I bought my first points my guide told me "Think about the future. How many points do you think you would need when you have a family.". So now that I don't have a family yet, I have to rent them out. When God is willing and we have a family, I might use all my points and then some...
That's a long winded way to say, yes you can rent them out. Just don't intentionally buy points to profit from it... or you'll get in trouble with a disney police.
PS: The key to renting is clear contract and no surprises.
I've had a renter who had a personal issue came up and kindly asked me if I could rerent the points. Our agreement clearly stated that I would do so and if I can find a renter he will get his $ back. But he also understood that if nobody picked it up, he'll be out the $. No surprises.
We were both fortunate that someone did rent out the points and I was able to give him his $ back.
Good luck with your decision!