We investigate global cascades in networks consisting of strategic agents with interdependent security. We assume that the strategic agents have choices between i) investing in protecting themselves, ii) purchasing insurance to transfer (some of) risks, and iii) taking no actions. Using a population game model, we study how various system parameters affect nodes' choices at Nash equilibria and the resultant price of anarchy/stability. In addition, we examine how the probability that a single infected node spreads the infection to a significant portion of the network, called cascade probability, behaves with respect to system parameters.