Why would you buy it? It's probably going to die, if a big player doesn't buy it. They need to get acquired if they want to be alive and get time in order to find a way to generate revenues.
I published an article about Snapchat a couple of days ago. Yes, it is. Snapchat is not a "sustainable business", it's a trend or a bubble. People are using it now, because it's cool; but in a couple of years, there will be another trend and so on. Even if they are still alive after 5 years, the valuation is ridiculous. Entrepreneurship is not about money, but at some point you need to face this problem and have a solution in your pocket. They are worth $4B and they don't have a clue. I guess this is just another groupon. (http://greatpreneurs.com/startups-dilemma-trends-businesses/)
I would probably say that it's good to have something that keeps you inspiring during your entrepreneurial journey. However 99% of what you need comes from experience and not from books.