Nah. Leaders and other notable people don't go around talking about niche subjects for no reason at all. It's way more likely that whoever made the transaction caused Milei talking about the coin (by whatever means you want to imagine, usually notable people accept money to promote things, but as much as Milei sound stupid enough to think he can do that as president - what is already a crime - I still expect it to be worse).
Also, there is the clear relationship between him and the coin creators.