Not only is LiFi safer, but the data transmission is barely being tapped into for it's true capabilities. We only have data going in one stream and out another. When you can have light transmitted data, you can have hundreds of data streams moving all at once.  Did you know that we still have not come anywhere near close to the capacity of fully utilizing optical fiber cables? Low attenuation cables are going to be the wire of the future lightspeed data transference machines.