You may earn 80% of the profits, but its a 100% for your loses. Thats not a fantastic bargain given that you instruct yourself to be idle, limit your own learning. And for gods sake, its like puting your own life in the hands of some1 you don't even understand (exaggerated).
I really don't like trading different peoples money, and I don't want them trading mine. On a positive note, trading your personal trades has more than just profit for you. You gain knowledge, expertise and the ability to share this with people that matter and appreciate you for it. Brag about earning money doing nothing. Trust me that aint cool