I get my first pagerank just on 1.5 months. my site get 700 backlink from my effort on other site comment and especially on this forum. I also get joined with stumbleupon, mybloglog, and blogcatalog.
PR and ranking both are different things but we can't say PR is not important. But it's true if you are working hard on your site and getting good back links and adding fresh content and update your site regularly then it will definitely help to get ranking and PR as well
I assume your site is a joke? "easily get high traffics, unlimited money by internet marketing and social bookmarking" Finally i can quit work and get unlimited money, 2 billion should do it! I'll quit my job in a second and I'll be ready for my unlimited cash and social bookmarking. Joker