Trump is under a lot of pressure. That's not healthy for a man his age. Especially one in his physical shape.
I doubt he gets much sleep these nights, and sleep deprivation can be a killer at his age, and can also lead to senility, and that runs in his family.
Both his parents had it when they weren't much older than him.
He may die before he ever gets to trial. Hopefully not of course, but he is up against a lot, and you will see him start breaking down mentally, physically, and financially the closer he gets to trial.