Financial schemes aren't easy. Nothing that can net you hundreds of thousands or millions ever is. The risk/reward ratio when comparing that to robbing a bank, mugging, running a book, etc. in my opinion is better than joining a family.

I'll excuse myself from the 'would I kill' question because 1) I wouldn't join a family and 2) wouldn't admit it, even jokingly, here.
I'd simply say I'd do what's best for my personal interest and leave it at that.