Purchase a better WIFI router and just hook it to that with it's ethernet, or a WIFI Access Point.
You won't get Gigabit through WIFI as there is no such rated tech, but you can get significantly higher speed than you are.
Something like NETGEAR R6700 Nighthawk AC1750 Dual Band Smart WiFi Router, Gigabit Ethernet (R6700)
You can go for higher end models in that series if your needs are greater than what that delivers.
EDIT: I've also been told before those cables are rated for either 3000 or 5000 lbs. I don't remember exactly as I have part of a telephone pole hanging from one of my lines behind my house where they cut down most of a pole but left a pretty big chunk of it just dangling in the air.