In 2015 I found one person betting with 300BTC while talking in chat I thought he is trolling until he send a screenshot and share a stretegy too that screenshot is legit.
I ask his country he said I am from srilanka then I ask from where you steal all this BTC normal people can't bet with this amount and then he stop replying.
although I use that screenshot in fooling people that I am rich I bet like this in 2018 I loose it and become poor again.