All investments are risky. Consider dot com for example. Back in the early 1990s, the majority were worthless? why? it was not as developed nor did it receive high visibility.
Those that own the dot coms back then had to pay yearly registration fees and back when google was not a corporation there was no adsense for them. They were as worthless as anything.
The point is. You have to develop the domain to create value, or wait until others develope them. If you wait for others to develop them, by the time you jump in, its too late.
If you develop them before others, you will be not making money in the early years because there' sno support for them yet.
Risk&Rewards go together. Be an entrepreneur and make a lot, at the same time lose alot. Or be behind the game and make a little or lose a little.
Its about your strategy and timing.