You are the one who introduced the DCA method, so you should know the risk as well. Also, if you are going to give him a loan so he can use it in the DCA method, isn’t it better if you just use it yourself? And you just said he is having some good turn up, then why would your friend still ask for a loan? If he really is and still asks, it means he is getting greedy or he is letting his emotions control him. Maybe that’s a sign you shouldn’t give a loan.