according to current pool stats you can mine 20 NAUT a day with 1,733 KH/s

A 280X hashes at 700KH/s at roughly 250watt. Lets say 1KWh is $ 0.10, that means u pay $ 0.60 a day.

1,733/700*0.60= $ 1.49

cost of mining NAUT, only electricity included and not the equipment would be 1.49/20= $ 0.074 and current price of writing is $ 0.087

this calculation only applies at current difficulty.

So at this moment at current prices there are miners that believes in NAUT, if not they probably move on. <-- from a miners perspective.