Gold hack?

Well that hack is fake obviously.

Gold hack literately from client side, if it was bug, exploit or something similar to that.

But it's like 98% from server side in any mmo to have gold hack would be possible, if someone know how to get into server side of their database and develop a hack that would let people use it and enters [xx amount]

^ this pretty much.

Any gold hack is just BS. For MMOs at least, mostly. Exceptions make the rule but any decent MMO publisher should have proper security/settings (server side) regarding things like this.