A few years back you purchased a domain name with the intention to develop a wonderful project one day. But with the time you lost interest in developing the project, now you no longer need the domain name and will let it expire.
Instead of just letting the domain expire, why not try to sell the domain name. The domain name no longer needed by you could be valuable for others. It may get you some additional income which can pay off your petty bills and sometimes get you a fortune.