We need to use our common sense here, if I had a method that allowed me to convert 50 dollars in one million, even if that was only a one time thing, I will never share that with anyone except my own family, the ROI is simply too good so the only conclusion we can make is that there is almost a 100% chance this is a scam, and I am being generous because I am pretty sure it is a 100% chance that this is a scam.
but he shows that he deposited money from wallet to primedice wallet and also withdraw it. That's fake? How?
No offence but this kind of attitude is going to get you scammed, instead of questioning the person making outlandish remarks about how this is even possible you want us to explain in detail how he did it, it is not our job to prove how he faked that, it is the job of the one making the claims that he did in fact won that much otherwise never believe any of those claims ever again.