Can you wear a sports bra all the time?

I don't see why not. I don't really find regular bras that comfortable either. But they do come in a lot of forms, similar too (even not exactly like) a sports bra. I don't know about wearing a sports bra to swim in. I've known a couple people that do it, but I'd think you'd want something that's meant for swimming so it doesn't absorb water to be comfortable.