Absolutely. If you're going to build a company on your .com domain, you want to grab it with every available TLD, and get common mis-spellings as well. It will cost a few hundred bucks, but it's worth it for peace of mind, and it's the best way to defeat squatters.
I try to get .com, .org and .net and not worry about the other TLDs.
I am registering a .com and wondering if others here register .net and .org if its available?
How much is the squatter asking? If it's a couple of thousand or less it might be worth getting it off them.
i sometimes register .org and .net. But I think these are overrated. everyone and their mother thinks ".com". that's it, end of story