Trust it with what? Trust it to do what? There's one thing AI can't do, and that's actually care about anyone or anything. It's the rough equivalent a psychopath. It would push you to a psychotic break with reality with its sycophancy just a happily as it would, say, murder you if given motive means and opportunity.
It could also help me use my time better. If it knows what I’ve been doing lately, it might give me useful tips.
So overall, more like a coach or assistant for everyday life.