What domains should I buy in order to get rich?

[RFL1986]

Those are all good points of advice. If you really want to ensure that you'll have a steady income only look at domain buying and selling as something extra. Although you can make an income from only domaining, like mentioned above, developing and doing research while working on the small-scale is really the best way to ensure that you're not just putting all of your eggs in one basket as it were.