Shall I renew SocialBookmarking.TV or not?

I’m having a domain socialbookmarking.tv and my registrar has send me a notice to renew it. Because I’ve invested in other names this socialbookmarking.tv is not holding my interest. And, I checked it at namecheap on 13 may 2013 at 11:05 time and it displayed the following results:

socialbookmarking.com is not available and when I checked the website I found it as a parking page with a note to buy the dot com version. and my browser doesn’t open the dot net version of it. http://socialbookmarking.info/ said problem loading the page. Dot org too was a landing page with a domain name for sale notice.

No top level domain has any information about the socialbookmarking contents.

I think, an another TLD is valuable if already one TLD is built as a very good content site.

Hence, based on above little research, I decided to let expire the socialbookmarking.tv – if you’re reading this and have interest in this domain, back order it.