For example, early buyers of domain names in the 90s made alot of money. They could buy great names for cheap prices which they later sold for tens of thousands or even millions of dollars. But they had to be able to foresee that domain names would be valuable, and then they had to be willing to take the risk to invest in them and hold them until they were worth alot.
Similarly, early internet marketers made alot of money. The more crowded the market gets, the harder it becomes (not impossible).
So what future trends do you think we can jump on board with now? In 2025, what will people be saying "If only I got in on this in 2013... I'd be rich today!"?