Wow thats really insane. For gamblers, There is always a big winning, and then a huge correction (loss).
there are only few people who manage to lose less then the amount of winning
The same force that makes people not stop at winning 5 BTC, makes them not stop when they're 10, or 20 or even 40 btc. It's pretty easy in hindsight for people to be like: "Why didn't they just cashout at " but the reality is they wouldn't have reached that all time high if they had a cashout attitude.
However, every so often I do see players who playing with: "I'm going to either lose all my money, or win X btc" and most of the time, they do lose, but those that do win end up cashing out at their high.