Very narrow as of now. But who knows bro, it can have value in the future. The question is, are you patient enough to wait? Just put the money in .com, not anything else. Unless it's extraordinary. Remember, the new domain extensions are just business (for profit). Changing a whole tried and tested system is a mission, and .com will be the one and only king, no matter how much these new extensions try to market their business. At the end, they are trying to make money of you, and sure they'll probably be couple sales and boosting from investors, but that's all. Selling a .com itself is as hard as it gets, unless it's a killer, but you are putting more burden on yourself with a new or unknown extension dude.