it is wonderful to read the responses, most tell you sure, you can win alot, it's easy. 1 even says he could be very profitable , he just does NOT want to. LOL. Now you see why poker will always be a wonderful dream. What is the saying? A chip and a chair and you could win a bracelet on TV and be famous.
Yes, it is ALL possible. The truth as a few have pointed out, is it will be very difficult to win enough money to consider it much or enough. People who actually win over a long term in poker have to study hard and long and then they have to play hard and long. IF you are young and you LOVE poker, I say go for it, but don't think it is the easy way to earn money. IF you have a real job, do you want to take 30-50% of your pay and "invest" in poker tournaments that you will likely be the worst player ?? If not and you want to play stakes that won't hurt, then your chance of winning goes up, BUT the amount you win comes way down.
My only advice is to start playing and only you will find the answer if poker is what you want. Good Luck in ALL you do