Each and any domain name can be worth something. Also, over time, the domains will be worth more as the scarcity will increase: there are more and more people online everyday and less and less available domains.
There are probably two main strategies for you to profit from this increase in value:
- Register as many domains as posssible without any consideration for their quality. The goal is to buy them as cheaply as possible.
- Focus on a portfolio of a few domains which are relatively expensive and well chosen. The goal will be to be sell them on in the not too distant future.
While the amount of money needed for both strategies is likely to be the same but the second one is usually considered less risky.