<prompt> Human: Hi all,I recently inherited 5,500 to invest in a retirement fund IRA. Wanting to invest in both a successful company and an organization I believe in preferably something geared toward sustainable living or environmentally responsible energy, I thought investing in one or a few of Elon Musks enterprises would be a good idea. Speaking with friends, I have learned that investing in Space X might not even be possible, as it isnt public yet, and that, traditionally, investing in stock that has recently increased significantly as Teslas has isnt a great idea. Any thoughts or advice either supporting or contradicting this info? Any alternative companies you suggest investing in that fit my criteria? Im 25 and I already have 2000 in my IRA invested in ATT not really my choice, but relatively safe and stable.  <response>: Youd be at a lot of risk hinging on one person. What if Musk dies and his enterprises go down as a result?This is something even Tesla calls out in their 10-K. 