puzzlefish
Legend
Loyaler
That kind of depends on which tournaments you choose, your general ability and most importantly whether or not the poker gods are on your side.
Seriously, online poker is like most competitive skills. You learn it, you practise it, you choose your moments, and hopefully all your hard work pays off.
How many people win gold at the Olympics? How many fantastic athletes don't even place? All you can do is give it your best.
Which is exactly why it's unrealistic to think it's something the average person can devote their time to and make a living doing. On the contrary the average person will be contributing to the pockets of the site operators and that's it.