tech bubble

A tech bubble is like a big bubble that people blow with soapy water. People around the world get very excited about things like new technology, new websites, and new gadgets, and they all buy into these things expecting that they are going to be very successful. This creates a lot of demand, and prices for these things go up very quickly. But eventually, the bubble has to burst because there isn't enough money for people to keep buying the same thing, and so the prices start coming down again.