M$100-1000 (my choice) if you think renaming twitter is a good idea, can articulate at least a sentence of (doesn't have to convince me) reason why, and I think you're not trolling.
(yes, i know, thought it'd be fun anyway)
Tiktok used to be called musical.ly now no one remembers that name. Tiktok might just be a better more fun name. Maybe they had some other reason to change their name. But no one remembers the old name. People will probably remember the name twitter for a while, but eventually x will just become the name everyone is used to.
In the mean time it will bring the website some publicity and as Matthew has said if Musk wants to create a unified website for everything x is a great name.
Also if he just changes the name back to twitter in a week, he got free publicity and no one was harmed and he can say it was just a joke.
Everyone still uses "twitter" and some people use "X" when talking about it, all it did was made us talk about it, it's a marketing move.
Also, Paypal (Elon's first business) used to be called X, I don't remember the story now but basically he wants a redemption arc of sorts where he can make Twitter his X
X is a financial platform, Elon is now also planning to add financial features into X using crypto etc, so there you go.