Yeah, it is quite a problem, when people make themselves to forget that they can lose and remember only about winnings. That's why often people think that they are unbeatable and then gambling beats them. Everyone must not just know that they can win and lose, but also remember about that (especially about losses).
I think that is human nature when it comes to gambling, because we don't want to accept to ourselves that we are losing yet we tend to play more to win more, we still lose because we failed to track our record.
Yeah right sometimes people forget that they had when gambling already lost a lot and when they forget their defeat to win ago. Maybe because the gamble seems to me looking for a win, so if they win they will be satisfied (maybe). It would be very difficult to me to stay away from the bitcoin.