I don't understand how coins have an APY system.  don't they lose?  Actually, I also have this type of coin which I got from participating in a bounty program with a total of 6 LUNU tokens 484 days ago.  and now the number has reached 3,180 automatically with an estimate of $50.  but after I checked I couldn't find the right information on where this coin was traded..So basically why do people believe in a system that doesn't make sense like this ?