One thing that irritated me about Killmonger was that he burned all the Panther Herbs. Goes to show how short sighted he was. Cuz the Panther herb gives you immense strength but not immortality. At some point he would have to sire children. If you die and there is no black panther then Wakanda is fukked. He acted like a typical tyrant. Basically he creates a system that is all about him and when he dies it would have went all to shyt.
There's a double reason for this. The 1st was explained by Agent Ross of him knowing how the CIA operates (which they have done in history). Killmonger first wanted to destroy all the herb due to the threat that someone could steal a piece of the herb for themselves and start a coup. To which is exactly the reason why Nakia stole a piece before he was able to have it all burned. The 2nd reason is more implied. He didn't want any one of superior powers once he is gone, so everyone after this would truly be equal. You did not need the transferring of the herb to reign supreme, especially when it is also tradition to remove yourself from that power when you are challenged for the throne. But the main immediate reason is to prevent a coup from happening.