hdpt00 - 4:23 am on Jun 8, 2004 (gmt 0)

I think he means one day it might be making a lot of money, but the next day someone better (or dare I say luckier) can come and kick your can to the ground. If you rely heavily on SERPs and not PPC or other ways then he might mean rankings change monthly, even daily now. Never depend on google keeping you at #1.