As an actual troll he hasn't really done much but post tired memes until buying a large stake in Twitter. Time will tell whether he's actually going to do anything interesting with this stake but based on track record I'm going with no.
Most of what qualifies him as a troll could be gleaned from a ten minute crash course in /b.
Well, is 'qualifying as a troll' really about appealing to the connoisseurs, the academy of trolling experts?
Or is it about making the most people the angriest?
It's like arguing about whether McDonald's is good food.
Some people think that suggesting an Edit button is telling.
"Here is the only imaginable use of an edit button. You post a tweet saying “I love puppies” with a picture of a cute puppy. A thousand people retweet your tweet; a thousand more quote-tweet it with comments like “what a good boi!” A week later, you edit the tweet to say “I think the Nazis got a bad rap,” with a picture of Hitler. Years later, a professor is denied tenure because someone digs through her old tweets to find that she called Hitler “a good boi.” This is absolutely the only purpose for the edit button, and oh man does accomplished Twitter troll Elon Musk know that. "
The former would completely negate the point of editing vs. deleting which one can already do.
The latter... perhaps, I guess? But then why bother? Are people so desperate to keep their internet points proxies by retweets and likes that they can't fathom reposting if there was an egregious error?
To me the whole exercise is one of malicious populism. It's an idea that appears liberty-generating on the surface and is used to gather a mob but has no real utility.