Some consider it “haram” (sin) some don’t. Meaning you shouldn’t gain money on the life of someone. That’s how it was explained to me by one of my clients. Some take that teaching or understanding further than others. I have a few Muslim clients and I have been turned down by some Muslim business owners I have tried to sell. I also had three very good & successful fellow agents when I was captive that were Muslim and sold it to other Muslims. They argued against those Muslims who consider it “haram” so I guess to each their own.