Could be somewhere in the middle. I imagine there's a cottage industry of designer drugs for the ruling class and their bubble. People say he does a lot of K but if it's K I'm sure it's 100% pure. He probably has access to five different amphetamines, each for a different purpose, with minimal side effects. I truly envy the ultra rich for their no personal risk drug access.

I know if I were a billionaire I'd be hiring the brightest minds in chemistry to create all kinds of drugs, therapeutic, functional, or recreational. Pure and safe. Create a pharmaceutical corporation that does real work and then pay the shadow chemists top dollar for secret R&D. The difference is I would try to find a way to give it away for free. Or find a way to get it to high level criminal leaders to distribute for low cost with high volume. Safe alternatives to fentanyl, etc.

Just daydreaming here as I'm off tomorrow and I only have alcohol and weed.

Edit- to actually respond, I think the only company he really touches with any regularity is Twitter, with obvious motives and results.

SpaceX - Has done very well and genuinely benefitted the progress of humanity. No indication he messes with it much anymore. I'm glad it exists.

The Boring Company - Don't think he's touched it in years. It's a front company to deliver barely more than jack shit and big promises. It's purpose is to undermine high speed rail and other infrastructure, to benefit:

Tesla - Kicked electric cars into high demand which I'm grateful for. But their vehicles suck and they're far too expensive. I don't think he touches this much anymore beyond the cybertruck.

Neuralink - Finally this. I think he lost interest in it. Killed a bunch of apes, helped some severely disabled people. But from what I understand the people who gained in ability are seeing their implants become less and less effective. I like the idea. I would definitely become a cyborg if someone offered, but I don't think I'd let them mess with my brain or spine yet. I hope to see super cool implants developed from the data they've gathered, but they'll probably hoard it. And of course once they're safe, the implants will only be for the ultra wealthy.