Everything bubble

The 'everything bubble' is an idea that sometimes too many people get excited about the same kind of investments, and so too many people buy them, which makes the prices really high. Just like how bubbles form on a pond when lots of people blow bubbles from the same spot at the same time, an 'everything bubble' is like lots of people buying the same thing at the same time, making the prices really high. Eventually, the bubble pops and the prices of the investments go back to normal.