Can you list some recent scientific publications authored by Elon Musk that you seem worthy of a Nobel Prize?
SpaceX or Musk just don't really fit into the cateogires that well, and the committee is probably not all that desperate for Musk's attention to give him a throwaway Peace prize.
I, for one, am glad Nobel Prizes are generally awarded (Peace prize being an exception) for extraordinary, individual research contributions, and not to controversial billionaire entrepreneurs.