I use most of them in gambling, and rest of them to buy digital goods
Me too, i used my bitcoin in gambling, hoping to win a large amount, but unfortunately its not happen. I always got lost my bitcoin. And usually i used my bitcoin in daily loads to my mobile, and others bitcoin i used to online shopping whose accepts bitcoin payment.
If you are loosing it regularly then why don't you quit gambling and try to save those coins for the future, you are a guy who don't want to learn from mistakes but want to continue same mistakes again and again.