Have you ever lost Bitcoin?
If that happened, why? Was it your own fault, or were you scammed?
"Your own fault" or "were yo scammed" are the same thing if you ask me , because if you get scammed then it was your fault for not using escrow in your transaction or trusting people just like that or simply using reversible payment methods . and no , I never lost any bitcoins and I'm not planning to start now .

Using trusted escrows has been proven to not be always a guarantee for safety. In that case it is very difficult to avoid being scammed here on this forum, even while using trusted forum escrows. Regarding OP; I am happy to say that I have not lost any coins.