From a Second Life perspective, a 3D Internet presents many challenges. The biggest one on the minds of most people is “How do I make money?” Because of the open nature of a 3D internet, any rules regarding permissions and copying simply cannot be enforced. The Second Life economic model will not work. There will be money making opportunities on the 3D internet, but the buying and selling of 3D goods for virtual cash can only be done in a closed off system like Second Life or an individual OS grid.