I just purchased a new domain name for my new online business. I purchased only .com and .net. Do I need to purchase all other domain names such as .org or .info?
No. You donot need to buy so many domain names. But if you want to make your busuness bigger enough to register trademark, you do better to get that domain names.
Thanks for your input. How about purchasing hyphenated name or words very similar to my domain? I have seen recommendation about purchasing these domain for SEO.
owning the .com is suffcient in all cases but if you secure those tlds too it will be good if you planning to make the domain brand big
It depends on how worried you are about others piggybacking your brand. i suggest to all my clients that they buy .org, .info, .biz and .com if they can. If they are thinking about going international in the future I get them buying the main country tlds in their key international markets. Yes, this costs money (but usually only up to a few hundred per year), but piece of mind is priceless...