You think my parents ever heard about it? Guess again
But it's more for fun of course, don't feel offended. It could go to zero tomorrow just as easily. If I look what I can actually do with Bitcoin today, it's still nothing other than having coins Goxxed at Gox and talk about being Goxxed here at bitcointalk. Bitcoin is great in our heads, but still absent in real life by all practical means.
The reason for spending time making useless graphs is to keep minds moving.
As long as the Bitcoin protocol is not compromised, Bitcoin will have a place unless international payments will be free of costs and instantaneously. The next few years, 2 billion people will get access to the Internet. No, they won't need a bank account. It's a game changer.
But of course it is possible that the paradigm shift has happened and that now the practical implementation must happen to make it a success. I'm having fun nonetheless.