Taking huge risk does not mean gambling. Obviously it must be calculated also. Let me change the scenery of flipping coin because your flipping coin Idea was not ideal because in that case you had actually nothing to lose from your side which was unrealistic. Let me give example. Suppose if you guess become right in case of flipping coin, you will get free poverty otherwise you will lose half of your asset. Will you still prefer to go for flipping. I won't recommend. It's not taking risk. It's gambling.