I dont believe that success awaits him with meme-coins. Meme-coins with Elon Musk name, his image have been launched years ago. One more ELON COIN (or whatever it will be called) will be unnoticed. And the hype seems to be over or about to end. Trump Coin has hypes, the rest can only be in shadow of his success. I think that people quickly will understand that this is pure try to jump in running train and wont be buying it.
I don't think it is necessary to draw conclusion on whether "MustIT" may be followed or not, rather it requires a good marketing and promotional strategies, and the "MuskIT" meme coin will perform at the long run.
In addition, If Musk's father has a good community, experiences team, institutional investors, Regular traders, the project will definitely have massive demands in near future.
As we know, the meme space is currently very competitive, and every meme project needs some serious marketing and promotional approach to survival the current trends and compete favorably with the old memes coins like Dogecoin, Pepe etc.