100 btc is not a small amount...
If this happens to me, I will repay
90 btc to him/her..
I don't want to break his/her heart..

Go ahead...
Your house your choice..

Obviously not.. it fluctuates like market shares..

Because it makes our transaction much easier and easy to use...

But most of the people use it for gambling. Around 90% of bitcoin is used for gambling. And most of them are locked away by FBI. So the remaining is used for trading. So as per me yes bitcoin is directly related to gambling.