You can not expect there are millionaires there. Almost all millionaires are obsessed with their business and have no time to visit forums. In fact, the life of a millionaire is not as bright as you think. I know because I was a friend of the millionaire.
You are wrong. If bitcoin made you a millionaire, you would certainly pay homage to Bitcointalk once in a while as the original bitcoin-centric forum. There are lots of interesting discussions around here. I'm certain that we have several millionaires around...but they keep it to themselves which is a good move.