Domain Names are being registered at an incredible rate of over 400,000 per week, but the real rush is yet to come. Some projections are a 93% increase over the next three years. Registering all the names within your budget that you think you might want in the future is not a bad idea. The cost is a lot lower than trying to buy then from someone else in the future. Besides, if you decide later that you don't want them just don't renew them and they will go back in the pool.