I suspect few people in the world have interacted with more individuals who lost bitcoin than I have.
I answered support tickets for a non-custodial web wallet that, at the time, was the most popular...
Every so often I get emails asking if this website or wallet is a scam, I lost X, how do I recover funds if I sent it to a scammer and it's tough to explain, what amazes me is how much wealth people are putting into a protocol they don't understand