In my opinion, marriage is a bad idea in general. Kids are a worse idea. Marriage without a pre-nup is a horrific idea if you’re the party with the greater amount of assets. In general, marriage is a triumph of hope over observable experience. Having said that…
A man or woman that brings up a pre-nup out of nowhere prior to a serious discussion regarding marriage is extremely odd unless the subject of pre-nups came up independently on its own (like, “I read recently that so-and-so didn’t have a pre-nup…”). A guy that says “he doesn’t want someone hanging around for the money” is also odd, in my opinion. On the other hand, your comment that you “don’t give a blank about whatever money he has” is a lie (conscious or subconscious) 90% of the time it’s uttered.
I’ll spare you a long diatribe on evolutionary psychology but, put simply, a man’s ability to make money is a signal, albeit a somewhat flawed one, of his ability to protect and provide for a woman and (their future?) children. (The biggest problem here is that there is a difference between “ability” and “willingness.”) Twenty thousand years ago agility and brute strength were a man’s primary evolutionary advantage in attracting females. Today brute strength, looks, etc. definitely help, but IN GENERAL TERMS the most important trait in attracting females is, quite obviously, the ability to make money. (THIS IS NOT A GOOD OR BAD THING HOWEVER. It’s merely an evolutionary adaptation – it’s morally neutral.) The vast majority of women over the age of 25 subconsciously know this to be true whether or not they are willing to admit it to themselves.
So, to sum things up, in my opinion it seems like you two are made for each other. He’s pretending that he has enough wealth for it to matter whether or not a pre-nup is necessary, and you’re pretending to not care about the money he probably doesn’t have. But I’ve been wrong before.