Not good. My rule of thumb is that I wouldn't even consider a hyphenated name if it wasn't a .com...and even then it would have to be damn good to overcome the dash. If Johnny Cochran was a domain speculator he might say... "If there's a dash, you must throw it in the trash."
richpeople.com might be good, but only if developed IMHO. Can't see anyone paying a premium for the name.
If you could be arsed, you could post info on the worlds richest people etc, coz that always fasinates people and should get you some traffic. Could also use it to sell business opportunities.