I think it will immediately hype and many people will invest in the coin, because many people believe if the price of the coin will definitely increase very high and of course Elon Musk will definitely make the coin is useful and have a function (maybe used for Tesla payment), therefore I will definitely invest in the coin too if indeed Elon Musk made his own coin, because I believe I can get a big profit from investing in the coin.
As expected, Elon Musk though he looks done with his shill but might come back again with some big news, creating a new coin would be another big responsibility for him, but if he wants to make more money, he can easily do that as making billions of dollars is easy for him since there are a lot of investors who will again just blindly follow the hype.