Hmmm
If I got any kind of powers that pretty much make you invulnerable ideally combined with a decent splattydoom power, then yeah I'd pretty much tell the world, cuz why not ? Sure I'd probably live to regret it eventually, but as long as I get a good decade of sheer naked awesome, I'd be ok with that. You can get a lot of luvin' done that way.
Alternatively, if I don't get to be invincible, then I'd say no, keep it secret.
Basically, any kind of super powers are pretty much a ticket to riches and fame and whatever else, but if you are still a squishy mortal, then its better to have people think you're just lucky/smart/whatever. If people know you are doing weird stuff to them, then thats just asking for someone to come and dissect you.
I think I'd actually prefer mind powers myself, and again kept secret. From mind reading to hypnosis, its all cool. The big flashy powers are all good and that, but you pretty much have to accept that if you use them for evil or even morally ambiguous purposes then its going to be incredibly obvious and people are at least going to try and stop you. At the very least, you are going to have problems spending any of your ill gotten gains.
Contrasted to mind powers, where you can almost be as evil as you like with them, invading peoples privacy, getting your own way and talking your way out of speeding tickets. As long as you are smart, no-one will even notice what you are doing. It'll pretty much just seem like you lead a charmed life, and then you just have to keep your head under radar, and you are golden.