A property bubble is when the prices of houses and other kinds of property go up and up and get more expensive. In Canada right now, property prices have been going up a lot. This means that people need to pay more money than they usually would to buy a property. It also means that if people already own a property they could sell it and get a lot of money. But, this bubble won't last forever. Eventually, prices will go down and people won't be able to get as much money for their property.