People don't like to report their losses. On the other hand, most people like to brag about their wins. What does it mean? Given huge discrepancies in individual wealth, when you see someone winning big, it may look big only to you and your "wealth status". The point is, these people may be winning as well as losing, and probably losing more at the end of the day, but since you see them report their wins only, it seems like they are always winning. We can call it a winner mentality without actually being a winner
Then, there is martingale which allows you to be always in profit (if used wisely)
There is sites that shows on the user's profile the stats for the profits, profits percentage, amount, win/loss amount, percentage, And so you can found players that have (all time) really huge amounts of wins,,
That's tells concretely that's there is nothing "impossible/insurmountable", all is question of good work good method