What do you mean by 9 to 5? I haven't heard that phrase before. Does it refer to office hours?He just got lucky; one of those flash-in-a-pan moments.
As for the original question, I believe you can make money from a website, but it takes an awful lot of time and dedication to get it up to the point where it can replace a 9-to-5 job. The Internet is far more volatile in that respect, so I'd personally never give up a 9-to-5 job in favor of it.
I mean, if you really wanted to make a living off the internet, you could build a website and hire people to work part-time. The initial costs will be high, but you can then begin to generate a decent living. Can it replace a normal job? Not easily. And probably not worth the effort.