Didn't you hear? The RNC is using all contributions to cover his legal bills. I don't even think that's legal, but when has that ever stopped them before? Nothing is functionally illegal when nobody will convict you.
It will either be immediately closed down, or it will be so flooded by bots and people that hate Trump that they will probably have to shut down anyway.
So many people hate the guy that I don't see any potential future where the platform is not swamped by people who hate him or bot nets run by people who hate him.