At first I was upset about the NFTs, but after having watched the video Trump made about the cards, it was clear to me that he was doing it partly for fun. He had several dry humor jokes in there, including him saying that he was a greater president than Lincoln and Washington.
He’s always done things with a sense of humor, including posting memes of himself doing silly things. Even if you don’t think that’s funny, we have enough bad things going on in the world that even attempts at humor are nothing wrong.