Mine started out while I was bored at worked during 2013 rush times. Mtgox was getting killed by complaints and it wasn't fully closed yet and people were having hard time cashing out their money so it was starting out. I got into bitcoin, made about 2 bitcoins or so and cashed some of it out, I sold some of my game characters for money and honestly just decided to gamble that money away at work because I was super bored in front of a PC all day everyday constantly.
Thankfully, I had a great boss who let me gamble, play games and watch shows at work because he knew I was doing a good job but one day I lost all of it on a martingale loss streak and just did not return to gambling for years.
You didn't know actually that you had bet all your money? If you are bored and wants to gamble to kill boredom, just gamble little amount just for entertainment, that is a lesson learned for you.
I hope that he can get the important lesson on his story and in the next time he played gambling, he doesn't use all of the money as a bet. And don't playing gambling when you are bored because you will get a loss in quickly and you didn't even realize for that. Perhaps, by using a small amount will make us prevent from the big loss so we can think that if we continue playing gambling, we will lose all the money.
One day I bet with my friend on a football match between Germany and Brazil. I bet that Brazil will win the match because it was my favorite team but unfortunately Brazil lost the match and I lost the bet. In that day I realize that I am not lucky in betting and leaved sports betting. But I have never gambled in casinos or online because I know the consequences of gambling.