I remember this dude that was in this Legion of Superheros arc who had the remarkable ability to simply not be there. People don't seem to notice him unless he wanted them to. That guy had managed to turn the galaxy on it's ear with that power. I'd simply use it to stay in fancy hotels and never have to pay for anything ever again. Like, sit in a fancy restaurant, order up a ton of food, then get up and leave and it's like nobody even remembered that I was there, or what I looked like at all. But then again, you could do far more with the ability to simply stop time.