That's not counting the near-impossibility of laundering and cashing in those 65,000BTC not to mention the years you'd spend in prison, ultimately rendering those 20,000BTC (or even 2,000BTC) a much better option.
I could easily have made a "Mateo" account and "won" the vast majority of those coins. Then they wouldn't be stolen, I would just be "lucky".
I didn't - but I could have - and presumably it would have been easy to "cash-in" those coins. If I was the kind of person who thought coins had to be "cashed in" before they were valuable.
My point is that being dishonest unfortunately *does* pay.
That would be highly unlikely and people would suspect that something is fishy though, statistically the chance of one account winning a vast majority of the bankroll is small.