Starlink. The one that connected the N Carolina hurricane victims when FEMA failed, and then again in Los Angeles.
NASA can now launch missions at 10% of the cost, due to SpaceX.
> Neuralink existed for years before Musk.
According to Google: "Neuralink, an invasive BCI company with a short-term goal of treating various neurological disorders such as quadriplegia, was founded by Elon Musk in 2016 with the intention of creating another “layer” to the brain to complement the functions of existing layers like the limbic system and the cortex."
It's now working on restoring sight to the blind. What a monster Musk is!
BTW, the value of his companies is what investors value it at. Surely they think they are worth it.