Martial arts and my cousin

My cousin and I have a weird relationship. He never visits me and then out of the blue he will bring his whole family around. I don’t know what motivates him but he is very strange. One year he did not speak to me for six months and then out of the blue he bought me a lifetime membership to bjj training in canberra. That would have cost him as much money as car. I was thankful for the gift but I am worried that my cousin makes some very poor decisions. He does kickboxing at that club so maybe he has taken one to many blows to the head. He has been doing it for three years. I think its time he stopped martial arts training.