The stock market is not a zero sum system Kingbee. You don’t need a ton of buyers to drive the prices to the moon. All you need is people thinking a piece of paper (stock) is super valuable and not selling. Add to that environment buyers suddenly thinking stocks is a good investment again and you have prices take off. A feeding frenzy.
You are right, it’s a bubble, driven by speculation like most bubbles (tech stocks in the late 90s, recent housing bubble, ect). Look in your history books, we go from bubble to bust all the time. It doesn’t do much good to just sit back and complain about it, does it?
If the bubble doesn’t burst before 2016, I hope you can learn how to say Hello Madam President Hillary. :) That’s how you win elections.