Because he didn't. As he explains, it seems like all he did was do a retweet of what he thought might be a good thing (like he does a lot), not create the coin and not profited from it. According to his own words:
> "A few hours ago I posted a tweet, as I have so many other times, supporting a supposed private enterprise with which I obviously have no connection whatsoever. I was not aware of the details of the project and after having become aware of it I decided not to continue spreading the word (that is why I deleted the tweet)."
Either the headlines know something we don't know to say he "backtracks on a memecoin" and "Argentinian President Milei launched a memecoin, $LIBRA" or they are not true. Given the context, it seems to be the latter, so I wonder why they'd be lying?
> "A few hours ago I posted a tweet, as I have so many other times, supporting a supposed private enterprise with which I obviously have no connection whatsoever. I was not aware of the details of the project and after having become aware of it I decided not to continue spreading the word (that is why I deleted the tweet)."
Either the headlines know something we don't know to say he "backtracks on a memecoin" and "Argentinian President Milei launched a memecoin, $LIBRA" or they are not true. Given the context, it seems to be the latter, so I wonder why they'd be lying?