I WON $800 ON A $100 DEPOSIT

I know its not alot compared to some of these other ones but my friends have been playing this online slot machine game and winning like crazy. I joined about a month ago and deposited 100 because they were doing a sign up bonus. I actually went all the way down to $24 but today i decided to check it out again and BOOM!!! Now do i pull out or GO ALL IN?