If everyone who had 1 Bitcoin became a millionaire then the world would have far to many millionaires and that status would not be as prestigious as today. Some people have thousands of Bitcoin so do the math, its pretty much impossible.
i think there is about 350 000 bitcoin owners in the world. if they all became milionaires/billionaires/dagobertducks they are still nothing compared to the currently at least 12 million existing millionaires.