Rank Drop

After one month and two week, my rank is started to drop for the first time. I think this is means, there are more than four hundred active players in this server. That is not very few. I do not know how many of them are operate by robot, but everywhere i went, i saw robot players. I think that is my level is too low, i can not see the real players, they are playing at high level area. I keep seeing there are people selling their account on facebook discuss forums. I know the game company is not allow account trading, but that seems very popular between internet, I never sold any of my account, even i did not play it anymore. It is like the body i have right now, i would bury in to ground instead of selling my body to another person.