No. It is actually a good idea to secure a domain name before someone else does. Names are currently registered at the rate of one every five seconds! A name that is available today might not be tomorrow. It is already very difficult to find an obvious ".com" name. A good domain name also gives you a unique presence on the web. It's not necessary to have a ".com" name for a business, but it helps. People are more likely to associate the two.
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