Got convinced by someone I very much trusted to join an MLM as a 19 or 20 year old. After my parents learned about it, they were able to talk some sense into me, and I realized I was part of a pyramid scheme. I got out and basically broke even, which was honestly the best possible outcome of that whole scenario. It unfortunately degraded my relationship with the person who convinced me to join, and I never really could fully trust them after that.