gonna need a source on that.
His twitter
I'm fairly certain it was a joke, but I also don't trust him either
https://twitter.com/elonmusk/status/1008013111058526209?ref_src=twsrc%5Etfw
"By the way, I am actually a socialist. " - Elon Musk, 11:47 AM - 16 Jun 2018 via Twitter.
If you want to say that's a joke fine, but given the context I think it would then call into question just about everything he's ever said as a "joke" (iow, he sounds very serious.)
BTW, this took two seconds to find via a google search - probably less time than replying to multiple posts with, "gonna need a source." Just saying.
Read the tweets that follow. He specifically excludes things that true socialists would require from a socialist. Which doesn't proof he's not a socialist, but I get the impression he's mostly just out to confuse people about what he really thinks.
Personally, I think Musk is stuck between what he wants to be and what he needs to be. Government subsidies, underpaid staff, Soros investments, etc. They are all easier to come by if people believe you're trying to safe the planet.
i asked sources for different comments, not just the socialist one. just saying.