You've all heard the term 'above the fold' and some of you may think this is an old practice an wave against keeping all the important info above the fold. Indeed, 'above the fold' is a diminishing custom. Although there are many who still abide by the procedure.
The phrase 'Above the Fold' was traditionally used with newspapers. The 'fold' implies to how the newspaper is folded. The crease, above which all the major news and headlines are situated. Since 'above the fold' is the area where all the important news is printed and so that is how the reader is captivated into buying the paper, came the importance of keeping the main points above the fold.
This practice evolved and is was widely practiced with email marketing and web designing. It makes sense to apply this practice in email marketing, since that is where most of us tend to look, above the fold. If what we see initially does not captivate us then off to the trash can the mail goes, without even a second thought. But for web pages, one can slack on the using the principle of keeping all the main info above the fold. This is purely because we all love to scroll and make it a point to see the whole web page before deciding to leave. So it doesn't actually make sense to keep all the interesting parts above the fold.
One can argue that the 'fold' can be defined differently for an email and a webpage. Of course, we all find it painstaking to scroll through emails but not on websites. Therefore, for the email the fold would exists at the end of the screen and for a webpage the fold would exist at the end of the page, no matter how long the page might be. Even so, I would suggest to keep certain captivating items above the fold, in a webpage, so that the visitors desires to keep exploring the webpage and eventually the website.
This is a purely a personal opinion, you can go ahead an do as you like with your webpage.