just wondering which on couple things. these questions are for people who played/plays high limit poker and does stocks.

1. which one is more risky
2. which one is more profitable and by how much
3. which one is easier to beat.
4. how much are you investing to get what kind of profit in stocks

and if you guys can post the first couple things you did /read to learn stocks please post it. couple things which basically taught u alot about stocks and how the whole thing works.