By the looks of things the crop top isn't going anywhere anytime soon with every second model at NYFW showing off their belly button! I'm not a fan of going the full belly (but perhaps if I was as teeny tiny as these girls then perhaps I would!) as I prefer showing just the top abs as this area is much easier to keep toned! I'm not big into 'trends' as you can probably tell, simply put I like the staples, but the cropped top if done right can be amazing and give you new lines and proportions, long legs being one of them!
Wear them with high waist skirts or pants, and even throw a jacket over the top to keep yourself modest with then that hint of skin... now thats sexy!
Here are a few good styles I've come across for your perusal...
Image from Grazia via Oracle Fox