Automatically refreshing cashe? (autocrawling)

Hey Guys

I like w3 total cache very much but i really cannot understand if there is no way to make it cache all the pages automatically so that you will never encounter a slow page on the site. as it is right now, someone has to be the victom of long loading times every time the cache expires? how do i do this, if its possible?

The page I need help with: [log in to see the link]