Who made lebron the king???

I do not understand how people since lebron had came into the league been calling him the king. What has he done?? sure he is a great player very athletic barely has to jump to slam but come he has to at least win something to be considered a king. If anything he should be known as the king of cleveland. If someone can tell me how he became known as the king I would love to know because everytime I hear hes the king it pisses me off, and it needs to stop