There is main use case of Nectar ($NEC) and that is serving as a deflationary governance and utility token within the DeversiFi exchange.
The main advantage is that you have a voting rights so you can shape the future and nature of DiversiFi ecosystem. The main constrain is that only few other exchanges listed this token. It is not so popilar and not traded much. If you are a regular DiversiFi trader than this token pays off. In this case I am recommending to buy and use this token. Otherwise the token seems little bit useless.