5 letter dot com domains are worth holding onto from a prospecting perspective. I also like the fact that this domain is pronouncable 'dabble' but unique.
If you don't plan on developing it down the road, I would hold onto it as it will only increase in value over time.
If you don't want to renew it, I wouldn't let it expire without first trying to sell it on one of the domain marketplaces. (Pool, Namedrive, Sedo should give you some ideas)
Depending on your traffic right now, Daabl is probably $$-$$$.
If you would rather just let it expire, I'd be happy to let you transfer it over to me instead 
|