https://www.reddit.com/r/IAmA/comments/1ch7wb/starting_with_almost_nothing_i_made_almost_500000/
In short version, he gambled on Bitcoin, made $500,000 - and lost it all later on, he then continued to gamble in Roulette and other games, and ended up with $50,000 in debt.
By the way,
This is not only related to Bitcoin or Casino Games - if you think Sports betting is different think twice after reading this:
https://www.psychforums.com/gambling-addiction/topic182379.html
This person lost over $300,000 within 48 hours, all because of sports betting, he had bets on tennis, basketball, soccer - you name it.
And there are many more stories to read such as this:
https://www.reddit.com/r/problemgambling/comments/4pzgmu/i_just_lost_140000_in_5_minutes/
Moral of the story - you can never be rich with gambling, and even if you end up being "rich" - you would lose the whole lot in no time ... only the house wins because the house has an edge.
Its not at all easy to control your emotions. In case you are winning, you are more tempted to spent more money in gambling and this could result in loss, as it did in OP case.
Well, if he does not know to take the profit out of gambling, then such winnings is of no use as it will all lost in other gambling activities.