Enterprises that unlock the value of data from IoT stand to establish strong competitive differentiation. To make money though will require a rigorous analysis of the marginal costs v marginal revenue of any IoT project. 

Security is one significant cost.

That needs to be costed over the long term  as well- the costs of maintaining the connectivity and integrity of every connected device.

There is a treasure trove of insight to be gained from the IoT but sorting the wheat from the chaff is essential.