Dude, none of us here has a static IP, period.
Many Internet providers still offer a static IP. This is not uncommon... it just is for typical home Internet usage to have dynamic. At my office I have a static IP... and this is often used for hosting purposes (you have a server at your location), as if you have a dynamic IP (which can range greatly in the timeline in which you get a new IP (from days, to weeks, to months)), you'd have to use a dynamic DNS system (like dyndns.org) to update domain A records. Whereas with static, your domains point to the same IP always. This makes your domain access more reliable as DNS tables for your records don't change.